{"title":"10HP Modules","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eWhere functionality meets ergonomics. 10HP range is designed for those who demand more from their hardware. This wider format allows for expanded circuit complexity and a spacious, tactile interface.\u003c\/p\u003e","products":[{"product_id":"3340-vco-eurorack-pcb-front-panel-diy-synth-oscillator","title":"3340 VCO Eurorack DIY Kit – PCB \u0026 Panel | Compatible with AS3340\/CEM3340 | 10HP","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e \u003cmeta name=\"description\" content=\"Explore the 3340 VCO (Voltage Controlled Oscillator), a versatile Eurorack module designed for intermediate to expert synthesists. With four distinct waveforms, including Square, Triangle, Ramp, and Sine, precise pulse width modulation, frequency control options, and support for AS3340 or CEM3340 integrated circuits, the 3340 VCO offers flexibility, customization, and high-quality sound generation.\"\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"277\" data-end=\"321\"\u003e3340 VCO (Voltage Controlled Oscillator)\u003c\/h2\u003e\n\u003cp data-start=\"323\" data-end=\"622\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe 3340 VCO is a 10HP skiff-friendly (25mm depth) Eurorack PCB and Front Panel Kit. This CEM3340\/AS3340-based analog oscillator is designed for intermediate builders and can be fully calibrated using only a chromatic tuner. This version of the kit includes the PCB and front panel only, allowing builders to source their own AS3340 IC and other necessary components.\u003c\/p\u003e\n\u003ch2 data-start=\"1793\" data-end=\"1821\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,0,0\"\u003eFormat:\u003c\/b\u003e Eurorack\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,1,0\"\u003eCore IC:\u003c\/b\u003e CEM3340 \/ AS3340 (High-accuracy VCO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,2,0\"\u003eWidth:\u003c\/b\u003e 10HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,3,0\"\u003eDepth:\u003c\/b\u003e 25mm (Skiff-friendly)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,4,0\"\u003eSkill Level:\u003c\/b\u003e Intermediate \/ Expert (Focus on precision calibration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cb data-index-in-node=\"0\" data-path-to-node=\"6,0,1,0\"\u003eCalibration Tools:\u003c\/b\u003e Chromatic Tuner (Standard guitar tuner or phone app is sufficient). No multimeter or oscilloscope required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,5,0\"\u003eCurrent Draw (+12V):\u003c\/b\u003e 15mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,6,0\"\u003eCurrent Draw (-12V):\u003c\/b\u003e 15mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,7,0\"\u003ePCB:\u003c\/b\u003e Professional-grade FR4; high-contrast silk-screen\u003c\/li\u003e\n\u003cli data-path-to-node=\"18,0,8,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"18,0,8,0\"\u003ePanel:\u003c\/b\u003e 1.6mm Black FR4; hand-applied orange and white graphics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"629\" data-end=\"645\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"648\" data-end=\"711\"\u003eEurorack PCB and front panel kit only\u003c\/li\u003e\n\u003cli data-start=\"714\" data-end=\"778\"\u003eSupports Square, Triangle, Ramp, and Sine waveform outputs\u003c\/li\u003e\n\u003cli data-start=\"781\" data-end=\"821\"\u003eHard Sync and Soft Sync inputs\u003c\/li\u003e\n\u003cli data-start=\"824\" data-end=\"893\"\u003eLinear Frequency Modulation and accurate 1V\/octave tracking\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"954\"\u003eExternal CV control for pulse width modulation (PWM) (0 to +5V)\u003c\/li\u003e\n\u003cli data-start=\"957\" data-end=\"981\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"988\" data-end=\"1017\"\u003eModulation \u0026amp; Sound Design\u003c\/h2\u003e\n\u003cp data-start=\"1018\" data-end=\"1313\"\u003eThe 3340 VCO offers a wide sonic range, from aggressive, harmonically rich tones to smooth and stable waveforms. With multiple sync options, linear FM, and precise pitch control, this Eurorack VCO design is well suited for complex modulation and expressive patching within modular synth systems.\u003c\/p\u003e\n\u003ch2 data-start=\"1320\" data-end=\"1347\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-start=\"1348\" data-end=\"1692\"\u003eThis DIY Eurorack VCO PCB and front panel kit is intended for intermediate to experienced builders. The PCB is clearly labeled to assist with assembly and troubleshooting. The included front panel is made from durable PCB material and screen printed by hand, providing a distinctive and professional appearance for your finished module.\u003c\/p\u003e\n\u003cp data-end=\"2207\" data-start=\"1929\"\u003eNeed help with tuning and setup? Read the \u003ca title=\"The 3340 VCO: Calibration\" href=\"https:\/\/gurugarasynth.com\/blogs\/diy-electronics-your-starting-point-for-synth\/the-3340-vco-calibration\"\u003e\u003cstrong data-end=\"630\" data-start=\"600\"\u003e3340 VCO Calibration Guide\u003c\/strong\u003e\u003c\/a\u003e for step-by-step calibration instructions and tracking tips.\u003c\/p\u003e\n\u003cp\u003e\u003ci data-path-to-node=\"8,1,1,0\" data-index-in-node=\"68\"\u003e(Note: Electronic components\/ICs are not included.)\u003c\/i\u003e\u003c\/p\u003e\n\u003ch2\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"Photo of a Eurorack module taken from the side to show the depth of the modules. Skiff Friendly.\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca title=\"Link to synth parts such as potentiometers and jack sockets.\" href=\"https:\/\/gurugarasynth.com\/collections\/parts\"\u003e\u003cspan\u003eCompatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVideo Demo\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/rQen6eYNV24?si=MgfR1HHBe_Mx0o9U\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/JQj5PAr9mrw?si=Wrm7VPSZkkNOsbB4\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/xh2-Q0MjN9w?si=zGneWWJub-69XKye\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":45238742745355,"sku":"","price":19.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340-VCO-V2.9.1---PCB_Panel-01_ec69623a-5ceb-47b1-af26-17332554d252.jpg?v=1714394374"},{"product_id":"dual-attack-release-envelope-generator-eurorack-pcb-front-panel-kit","title":"Dual Attack \/ Release Envelope Generator \/  Eurorack \/ PCB \u0026 Front Panel","description":"\u003ch2 data-start=\"298\" data-end=\"342\"\u003eDual Attack \/ Release Envelope Generator\u003c\/h2\u003e\n\u003cp data-start=\"344\" data-end=\"692\"\u003eThe Dual Attack \/ Release Envelope Generator Eurorack PCB and Front Panel Kit is a flexible DIY envelope module designed to shape the rising and falling edges of incoming gate or trigger signals. It provides two independent A\/R envelope generators, making it ideal for shaping VCAs, filters, and modulation destinations in Eurorack systems.\u003c\/p\u003e\n\u003ch2 data-start=\"699\" data-end=\"715\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"718\" data-end=\"756\"\u003eEurorack PCB and front panel kit\u003c\/li\u003e\n\u003cli data-start=\"759\" data-end=\"817\"\u003eTwo independent Attack \/ Release envelope generators\u003c\/li\u003e\n\u003cli data-start=\"820\" data-end=\"887\"\u003eSelectable Fast \/ Short and Slow \/ Long envelope behavior\u003c\/li\u003e\n\u003cli data-start=\"890\" data-end=\"951\"\u003eAdjustable attack and release times via capacitor selection\u003c\/li\u003e\n\u003cli data-start=\"954\" data-end=\"1016\"\u003eGate-to-trigger conversion for short envelope generation\u003c\/li\u003e\n\u003cli data-start=\"1019\" data-end=\"1093\"\u003eSwitched jack routing allows single signal to trigger both envelopes\u003c\/li\u003e\n\u003cli data-start=\"1096\" data-end=\"1162\"\u003eFront panel made from PCB material, screen printed by hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1169\" data-end=\"1198\"\u003eEnvelope Modes \u0026amp; Behavior\u003c\/h2\u003e\n\u003cp data-start=\"1199\" data-end=\"1250\"\u003eEach envelope generator offers two response styles:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1253\" data-end=\"1331\"\u003e\n\u003cstrong data-start=\"1253\" data-end=\"1269\"\u003eFast \/ Short\u003c\/strong\u003e – ideal for percussive sounds, plucks, and rapid modulation\u003c\/li\u003e\n\u003cli data-start=\"1334\" data-end=\"1411\"\u003e\n\u003cstrong data-start=\"1334\" data-end=\"1349\"\u003eSlow \/ Long\u003c\/strong\u003e – suitable for sustained tones and gradual envelope shaping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1413\" data-end=\"1563\"\u003eAttack and release times are defined by electrolytic capacitors, allowing builders to easily customize envelope response to suit their patching style.\u003c\/p\u003e\n\u003ch2 data-start=\"1570\" data-end=\"1604\"\u003eTiming Control \u0026amp; Customization\u003c\/h2\u003e\n\u003cp data-start=\"1605\" data-end=\"1654\"\u003eEnvelope timing is controlled by four capacitors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1657\" data-end=\"1686\"\u003e\n\u003cstrong data-start=\"1657\" data-end=\"1668\"\u003eC1 \u0026amp; C3\u003c\/strong\u003e – Attack timing\u003c\/li\u003e\n\u003cli data-start=\"1689\" data-end=\"1719\"\u003e\n\u003cstrong data-start=\"1689\" data-end=\"1700\"\u003eC2 \u0026amp; C4\u003c\/strong\u003e – Release timing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1721\" data-end=\"1749\"\u003eRecommended starting values:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1752\" data-end=\"1788\"\u003eC1 and C3: \u003cstrong data-start=\"1763\" data-end=\"1770\"\u003e1µF\u003c\/strong\u003e (faster attack)\u003c\/li\u003e\n\u003cli data-start=\"1791\" data-end=\"1829\"\u003eC2 and C4: \u003cstrong data-start=\"1802\" data-end=\"1810\"\u003e22µF\u003c\/strong\u003e (slower release)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1831\" data-end=\"2011\"\u003eUsing larger capacitor values will result in slower envelope segments, while smaller values produce faster response times. Experimentation is encouraged for custom envelope shapes.\u003c\/p\u003e\n\u003ch2 data-start=\"2018\" data-end=\"2044\"\u003eGate \u0026amp; Trigger Routing\u003c\/h2\u003e\n\u003cp data-start=\"2045\" data-end=\"2203\"\u003eA built-in gate-to-trigger converter enables short envelope generation, particularly useful when working with sequencers that lack adjustable gate length.\u003c\/p\u003e\n\u003cp data-start=\"2205\" data-end=\"2236\"\u003eSwitched jack connections link:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2239\" data-end=\"2267\"\u003eTrigger Out → Gate 1 Input\u003c\/li\u003e\n\u003cli data-start=\"2270\" data-end=\"2299\"\u003eGate 1 Input → Gate 2 Input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2301\" data-end=\"2499\"\u003eThis allows a single gate or trigger source to activate both envelope generators. Inserting a jack overrides the internal routing, providing full flexibility when using separate control sources.\u003c\/p\u003e\n\u003ch2 data-start=\"2506\" data-end=\"2533\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-start=\"2534\" data-end=\"2774\"\u003eThis intermediate-level Eurorack DIY kit is intended for builders with some soldering experience. The front panel is made from durable PCB material and hand screen printed, maintaining consistency with other Guru Gara Synth modules.\u003c\/p\u003e\n\u003cp data-start=\"2534\" data-end=\"2774\"\u003e\u003cstrong\u003eBuild note:\u003c\/strong\u003e Use B100K potentiometers for the Attack controls (labeled 10K on the PCB).\u003c\/p\u003e\n\u003ch2 data-start=\"2879\" data-end=\"2907\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2910\" data-end=\"2928\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Eurorack\u003c\/li\u003e\n\u003cli data-start=\"2931\" data-end=\"2944\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003c\/li\u003e\n\u003cli data-start=\"2947\" data-end=\"2974\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 25mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eCompatible components such as potentiometers, jack sockets, knobs, and other build parts can be found in the \u003ca href=\"https:\/\/gurugarasynth.com\/collections\/parts\" title=\"Parts and components for DIY synth projects.\"\u003eSynth Parts\u003c\/a\u003e category.\u003c\/span\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":45247400771851,"sku":"","price":19.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Dual-AR-V1.7---PCB-and-Front-Panel-01_be555d5c-4350-47fa-beeb-62585833a613.jpg?v=1714394484"},{"product_id":"3350-multimode-vcf-eurorack-pcb-and-front-panel","title":"3350 Multimode VCF \/ Eurorack  \/ PCB and Front Panel","description":"\u003ch2 data-start=\"309\" data-end=\"331\"\u003e3350 Multimode VCF\u003c\/h2\u003e\n\u003cp data-start=\"333\" data-end=\"697\"\u003eThe 3350 Multimode VCF Eurorack PCB and Front Panel Kit is a versatile DIY voltage-controlled filter built around the classic 3350 filter IC (CEM3350, AS3350, or equivalent). Implemented as a state variable filter topology, it provides multiple filter responses simultaneously, making it a powerful and flexible sound-shaping tool for Eurorack systems.\u003c\/p\u003e\n\u003ch2 data-start=\"704\" data-end=\"720\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"723\" data-end=\"761\"\u003eEurorack PCB and front panel kit\u003c\/li\u003e\n\u003cli data-start=\"764\" data-end=\"825\"\u003eState variable filter (SVF) design based on the 3350 IC\u003c\/li\u003e\n\u003cli data-start=\"828\" data-end=\"889\"\u003eSimultaneous low-pass, band-pass, and high-pass outputs\u003c\/li\u003e\n\u003cli data-start=\"892\" data-end=\"958\"\u003eFrequency and resonance controls with CV input and CV amount\u003c\/li\u003e\n\u003cli data-start=\"961\" data-end=\"999\"\u003eIntegrated two-input audio mixer\n\u003cul\u003e\n\u003cli data-start=\"1004\" data-end=\"1033\"\u003eInput 1 fixed at full level\u003c\/li\u003e\n\u003cli data-start=\"1038\" data-end=\"1069\"\u003eInput 2 with adjustable level\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1072\" data-end=\"1117\"\u003eBeginner to intermediate friendly DIY build\u003c\/li\u003e\n\u003cli data-start=\"1120\" data-end=\"1186\"\u003eFront panel made from PCB material, screen printed by hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1193\" data-end=\"1236\"\u003eState Variable Filtering \u0026amp; Sound Design\u003c\/h2\u003e\n\u003cp data-start=\"1237\" data-end=\"1491\"\u003eThe 3350 Multimode VCF uses a state variable filter core, allowing low-pass, band-pass, and high-pass signals to be accessed at the same time. This makes the module ideal for parallel filtering, complex patching, and advanced sound design techniques.\u003c\/p\u003e\n\u003cp data-start=\"1493\" data-end=\"1702\"\u003eSmooth frequency sweeps and controllable resonance provide classic analog character, while voltage control over both frequency and resonance enables expressive modulation using envelopes, LFOs, and sequencers.\u003c\/p\u003e\n\u003ch2 data-start=\"1709\" data-end=\"1736\"\u003eIntegrated Audio Mixing\u003c\/h2\u003e\n\u003cp data-start=\"1737\" data-end=\"2029\"\u003eA built-in two-input audio mixer allows you to combine sound sources directly at the filter input. Input 1 is internally set to full level, while Input 2 includes a level control for balancing multiple oscillators or audio sources — reducing the need for an external mixer in compact systems.\u003c\/p\u003e\n\u003ch2 data-start=\"2036\" data-end=\"2063\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-start=\"2064\" data-end=\"2292\"\u003eThis DIY Eurorack filter kit is suitable for beginner to intermediate builders. The front panel is made from durable PCB material and hand screen printed, ensuring a cohesive aesthetic across Guru Gara Synth modules.\u003c\/p\u003e\n\u003ch2 data-start=\"2299\" data-end=\"2327\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2330\" data-end=\"2348\"\u003e\n\u003cstrong\u003eFormat: \u003c\/strong\u003eEurorack\u003c\/li\u003e\n\u003cli data-start=\"2351\" data-end=\"2364\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003c\/li\u003e\n\u003cli data-start=\"2367\" data-end=\"2405\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 25mm\u003c\/li\u003e\n\u003cli data-start=\"2408\" data-end=\"2454\"\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e State Variable Filter (SVF)\u003c\/li\u003e\n\u003cli data-start=\"2457\" data-end=\"2507\"\u003e\n\u003cstrong\u003eFilter IC:\u003c\/strong\u003e 3350 (CEM3350 \/ AS3350 or equivalent)\u003c\/li\u003e\n\u003cli data-start=\"2510\" data-end=\"2551\"\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Low-pass, Band-pass, High-pass\u003c\/li\u003e\n\u003cli data-start=\"2554\" data-end=\"2605\"\u003e\n\u003cstrong\u003eAudio Inputs:\u003c\/strong\u003e 2 (one fixed level, one adjustable)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/drive.google.com\/drive\/folders\/1kFcSNZwS_2e25h4Far8a9xPil2s7mu3q?usp=drive_link\" title=\"3350 Multimode VCF \/ Schematic \/ Component List\" target=\"_blank\"\u003e\u003cspan\u003eView Documents\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca title=\"Link to synth parts such as potentiometers and jack sockets.\" href=\"https:\/\/gurugarasynth.com\/collections\/parts\"\u003eCompatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVideo Demo\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/mMGIHkHu_SU?si=WSEaPDLznZ1NFvtd\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":45247430131979,"sku":"","price":19.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3350-Multimode-VCF-01_8d966dd1-ecd4-4b48-aef8-335ebd53b5e3.jpg?v=1714394397"},{"product_id":"multi-ctrl-eurorack-pcb-and-front-panel","title":"Multi CTRL \/ Eurorack \/ PCB and Front Panel","description":"\u003ch2 data-end=\"254\" data-start=\"240\"\u003eMulti CTRL\u003c\/h2\u003e\n\u003cp data-end=\"583\" data-start=\"256\"\u003eThe Multi CTRL Eurorack PCB and Front Panel Kit is a DIY control voltage utility module designed to control multiple parameters using a single knob. It generates a bipolar control voltage and distributes it across multiple outputs, making it ideal for coordinated modulation and macro-style control in Eurorack systems.\u003c\/p\u003e\n\u003ch2 data-end=\"606\" data-start=\"590\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"647\" data-start=\"609\"\u003eEurorack PCB and front panel kit\u003c\/li\u003e\n\u003cli data-end=\"710\" data-start=\"650\"\u003eSingle-knob controller for multiple destinations\u003c\/li\u003e\n\u003cli data-end=\"755\" data-start=\"713\"\u003eGenerates bipolar CV from -5V to +5V\u003c\/li\u003e\n\u003cli data-end=\"791\" data-start=\"758\"\u003eFour CV outputs, each with:\n\u003cul\u003e\n\u003cli data-end=\"823\" data-start=\"796\"\u003eIndividual amount control\u003c\/li\u003e\n\u003cli data-end=\"849\" data-start=\"828\"\u003eInverter switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"921\" data-start=\"852\"\u003eExternal CV input to combine with the generated control voltage\u003c\/li\u003e\n\u003cli data-end=\"970\" data-start=\"924\"\u003eCan function as a simple active multiple\u003c\/li\u003e\n\u003cli data-end=\"997\" data-start=\"973\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1028\" data-start=\"1004\"\u003eControl \u0026amp; Modulation\u003c\/h2\u003e\n\u003cp data-end=\"1331\" data-start=\"1029\"\u003eMulti CTRL allows you to create a central control voltage using the main CTRL knob and send it to up to four destinations simultaneously. Each output can be independently scaled and inverted, enabling complex modulation relationships such as opposing movement, subtle offsets, or exaggerated responses.\u003c\/p\u003e\n\u003cp data-end=\"1506\" data-start=\"1333\"\u003eAn external CV source can be added to the internally generated CV, allowing the module to act as a modulation hub that blends manual control with dynamic modulation sources.\u003c\/p\u003e\n\u003ch2 data-end=\"1540\" data-start=\"1513\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-end=\"1784\" data-start=\"1541\"\u003eThis DIY Eurorack CV control PCB and front panel kit is intended for intermediate builders. The front panel is made from durable PCB material and screen printed by hand, ensuring a cohesive aesthetic across Guru Gara Synth modules.\u003c\/p\u003e\n\u003ch2 data-end=\"1819\" data-start=\"1791\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1840\" data-start=\"1822\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Eurorack\u003c\/li\u003e\n\u003cli data-end=\"1856\" data-start=\"1843\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003c\/li\u003e\n\u003cli data-end=\"1886\" data-start=\"1859\"\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 25mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/drive.google.com\/drive\/folders\/1rBYGaFVVcwKkIoUz_1Mcstqrsz1iEwLQ?usp=drive_link\" title=\"Multi CTRL Build Document \/ Schematic \/ Component List\" rel=\"noopener\" target=\"_blank\"\u003eView Documents\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/gurugarasynth.com\/collections\/parts\" title=\"Link to synth parts such as potentiometers and jack sockets.\"\u003eCompatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.\u003c\/a\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":45251457614091,"sku":"","price":19.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Multi-CTRL-PCB-_-Panel-01_a297b934-1dc7-447c-b42b-6c82f9b9f1fe.jpg?v=1714394522"},{"product_id":"3310-vc-adsr-voltage-controlled-envelope-generator-eurorack","title":"3310 VC-ADSR Eurorack DIY Kit – PCB \u0026 Panel | AS3310\/CEM3310 Compatible | 10HP","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch2 data-start=\"225\" data-end=\"281\"\u003e3310 VC-ADSR (Voltage Controlled Envelope Generator)\u003c\/h2\u003e\n\u003cp data-start=\"283\" data-end=\"581\"\u003eThe 3310 VC-ADSR Eurorack PCB and Front Panel Kit is a DIY voltage controlled envelope generator based on the reliable CEM3310 \/ AS3310 IC. Designed for Eurorack modular systems, this ADSR provides precise and flexible envelope shaping, suitable for both beginner and intermediate builders.\u003c\/p\u003e\n\u003ch2 data-start=\"588\" data-end=\"604\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"607\" data-end=\"645\"\u003eEurorack PCB and front panel kit\u003c\/li\u003e\n\u003cli data-start=\"648\" data-end=\"705\"\u003eBased on the CEM3310 \/ AS3310 envelope generator IC\u003c\/li\u003e\n\u003cli data-start=\"708\" data-end=\"785\"\u003eClassic ADSR envelope with Attack, Decay, Sustain, and Release controls\u003c\/li\u003e\n\u003cli data-start=\"788\" data-end=\"850\"\u003eCV inputs with CV amount control for each envelope stage\u003c\/li\u003e\n\u003cli data-start=\"853\" data-end=\"899\"\u003eLED envelope display for visual feedback\u003c\/li\u003e\n\u003cli data-start=\"902\" data-end=\"949\"\u003eGate input via power bus or external jack\u003c\/li\u003e\n\u003cli data-start=\"952\" data-end=\"976\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"983\" data-end=\"1017\"\u003eEnvelope Control \u0026amp; Performance\u003c\/h2\u003e\n\u003cp data-start=\"1018\" data-end=\"1318\"\u003eThe 3310 VC-ADSR offers precise control over envelope shaping, from fast, snappy transients to long, evolving contours. Voltage control over each ADSR stage allows for dynamic modulation and expressive patching, while the LED display provides clear visual feedback of the envelope shape in real time.\u003c\/p\u003e\n\u003ch2 data-start=\"1325\" data-end=\"1353\"\u003eGate Input \u0026amp; Integration\u003c\/h2\u003e\n\u003cp data-start=\"1354\" data-end=\"1623\"\u003eFor effortless integration into Eurorack systems, the module can receive a gate signal directly from the power bus via the ribbon power cable. Inserting a gate jack overrides the bus signal, allowing the use of an external gate source for flexible patching options.\u003c\/p\u003e\n\u003ch2 data-start=\"1630\" data-end=\"1657\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-start=\"1658\" data-end=\"1934\"\u003eThis DIY Eurorack ADSR PCB and front panel kit is designed to be approachable for builders with basic soldering experience. The front panel is made from durable PCB material and hand screen printed, giving the finished module a distinctive and high-quality appearance.\u003c\/p\u003e\n\u003cp data-start=\"1936\" data-end=\"2013\"\u003eA simplified non-CV version of this envelope generator is also available.\u003c\/p\u003e\n\u003ch2 data-start=\"2020\" data-end=\"2048\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2051\" data-end=\"2069\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Eurorack\u003c\/li\u003e\n\u003cli data-start=\"2072\" data-end=\"2085\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2072\" data-end=\"2085\"\u003e\n\u003cstrong\u003eDepth: \u003c\/strong\u003e25 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2693\" data-start=\"2428\"\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: medium;\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/gurugarasynth.com\/collections\/parts\" title=\"Link to synth parts such as potentiometers and jack sockets.\"\u003e\u003cspan\u003eCompatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":51236533502219,"sku":"","price":19.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3310-VC-ADSR-PCB-_-Front-Panel-01.jpg?v=1744268801"},{"product_id":"3340-vco-with-as3340-ic","title":"3340 VCO PCB and Front Panel with AS3340 IC","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e \u003cmeta name=\"description\" content=\"Explore the 3340 VCO (Voltage Controlled Oscillator), a versatile Eurorack module designed for intermediate to expert synthesists. With four distinct waveforms, including Square, Triangle, Ramp, and Sine, precise pulse width modulation, frequency control options, and support for AS3340 or CEM3340 integrated circuits, the 3340 VCO offers flexibility, customization, and high-quality sound generation.\"\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"290\" data-end=\"334\"\u003e3340 VCO (Voltage Controlled Oscillator)\u003c\/h2\u003e\n\u003cp data-start=\"336\" data-end=\"662\"\u003eThe 3340 VCO Eurorack PCB and Front Panel Kit is a DIY voltage controlled oscillator based on the classic AS3340 integrated circuit. Designed for Eurorack format systems, this kit allows intermediate to experienced builders to assemble a powerful analog VCO with extensive modulation options and a professional finish.\u003c\/p\u003e\n\u003ch2 data-start=\"669\" data-end=\"685\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"688\" data-end=\"723\"\u003eBased on the AS3340 analog VCO IC\u003c\/li\u003e\n\u003cli data-start=\"688\" data-end=\"723\"\u003eFour waveform outputs: Square, Triangle, Ramp, and Sine\u003c\/li\u003e\n\u003cli data-start=\"790\" data-end=\"830\"\u003eHard Sync and Soft Sync inputs\u003c\/li\u003e\n\u003cli data-start=\"833\" data-end=\"902\"\u003eLinear Frequency Modulation and accurate 1V\/octave tracking\u003c\/li\u003e\n\u003cli data-start=\"905\" data-end=\"963\"\u003eExternal CV control for pulse width modulation (PWM)\u003c\/li\u003e\n\u003cli data-start=\"966\" data-end=\"990\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"997\" data-end=\"1026\"\u003eModulation \u0026amp; Sound Design\u003c\/h2\u003e\n\u003cp data-start=\"1027\" data-end=\"1298\"\u003eWhether you’re aiming for aggressive, edgy tones or smooth and mellow sounds, the 3340 VCO offers a wide sonic range. The combination of sync options, linear FM, and precise pitch control makes this Eurorack VCO well suited for complex modulation and expressive patching.\u003c\/p\u003e\n\u003ch2 data-start=\"1305\" data-end=\"1332\"\u003eDIY Build \u0026amp; Front Panel\u003c\/h2\u003e\n\u003cp data-start=\"1333\" data-end=\"1709\"\u003eThis Eurorack PCB and front panel kit includes a clearly labeled PCB to simplify assembly and an AS3340 IC as the core oscillator component. The included front panel is made from durable PCB material and screen printed by hand, giving each module a unique and high-quality appearance. The DIY format allows for customization while maintaining reliable performance.\u003c\/p\u003e\n\u003ch2 data-start=\"1716\" data-end=\"1744\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1747\" data-end=\"1765\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Eurorack\u003c\/li\u003e\n\u003cli data-start=\"1768\" data-end=\"1781\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003c\/li\u003e\n\u003cli data-start=\"1823\" data-end=\"1861\"\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e +12V: 15mA, −12V: 15mA\u003c\/li\u003e\n\u003cli data-start=\"1823\" data-end=\"1861\"\u003e\n\u003cstrong data-start=\"966\" data-end=\"990\"\u003e\u003c\/strong\u003e\u003cstrong\u003eDepth:\u003c\/strong\u003e\u003cspan\u003e 25\u003c\/span\u003emm \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2428\" data-end=\"2693\"\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/drive.google.com\/drive\/folders\/1XDam3tI51dTfT7S4t0QQgIuX0uKaGJmW?usp=drive_link\" rel=\"noopener\" target=\"_blank\"\u003eView Documents\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/gurugarasynth.com\/collections\/parts\" title=\"Link to synth parts such as potentiometers and jack sockets.\"\u003e\u003cspan\u003eCompatible items such as knobs, potentiometers, jack sockets, and other build components can also be found in the Synth Parts category.\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVideo Demo\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/rQen6eYNV24?si=BYOtR0N4zbYyAh6v\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/JQj5PAr9mrw?si=xYTIKk06GKusI0SA\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/xh2-Q0MjN9w?si=OIs50hhQov7ooELe\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":51892922745099,"sku":null,"price":33.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340-VCO-PCB-kit-with-AS3340-01.jpg?v=1752049674"},{"product_id":"3340-vco-voltage-controlled-oscillator-full-diy-kit","title":"3340 VCO Easy Build Eurorack Full Kit | AS3340\/CEM3340 Compatible | 10HP","description":"\u003cp data-end=\"556\" data-start=\"153\"\u003eThe 3340 VCO Eurorack Complete Kit is an easy-build DIY voltage controlled oscillator based on the classic AS3340\/CEM3340 design, created for Eurorack format systems. This complete kit includes the PCB, front panel, and all required electronic components, making it an ideal choice for builders who want everything included in one package while saving time on sourcing parts from multiple suppliers.\u003c\/p\u003e\n\u003cp data-end=\"1032\" data-start=\"558\"\u003eTo streamline the build process and ensure consistent performance, all essential SMD components are professionally assembled at the factory. The builder completes the module by installing the through-hole (THT) components, offering a satisfying DIY experience without the complexity of SMD soldering. This approach significantly reduces build time and lowers the risk of assembly errors, making it a reliable and time-saving option for both new and experienced DIY builders.\u003c\/p\u003e\n\u003ch2 data-end=\"841\" data-start=\"825\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"922\" data-start=\"844\"\u003eComplete Eurorack VCO full kit (PCB, front panel, and all components included)\u003c\/li\u003e\n\u003cli data-end=\"957\" data-start=\"925\"\u003eFactory-assembled SMD components\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1062\" data-start=\"1013\"\u003eSquare, Triangle, Ramp, and Sine waveform outputs\u003c\/li\u003e\n\u003cli data-end=\"1095\" data-start=\"1065\"\u003eHard Sync and Soft Sync inputs\u003c\/li\u003e\n\u003cli data-end=\"1146\" data-start=\"1098\"\u003eLinear FM input with accurate 1V\/octave tracking\u003c\/li\u003e\n\u003cli data-end=\"1212\" data-start=\"1149\"\u003eExternal CV control for pulse width modulation (PWM) (0 to +5V)\u003c\/li\u003e\n\u003cli data-end=\"1235\" data-start=\"1215\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1260\" data-start=\"1237\"\u003eIncluded Components\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1311\" data-start=\"1263\"\u003eEurorack PCB with pre-assembled SMD components\u003c\/li\u003e\n\u003cli data-end=\"1410\" data-start=\"1314\"\u003ePCB front panel (black PCB with factory-printed white graphics and gold-plated exposed copper)\u003c\/li\u003e\n\u003cli data-end=\"1427\" data-start=\"1413\"\u003eJack sockets\u003c\/li\u003e\n\u003cli data-end=\"1446\" data-start=\"1430\"\u003ePotentiometers\u003c\/li\u003e\n\u003cli data-end=\"1463\" data-start=\"1449\"\u003eControl knob\u003c\/li\u003e\n\u003cli data-end=\"1484\" data-start=\"1466\"\u003eIDC power socket\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1487\"\u003eTrimmers\u003c\/li\u003e\n\u003cli data-end=\"1518\" data-start=\"1500\"\u003eTiming capacitor\u003c\/li\u003e\n\u003cli data-end=\"1532\" data-start=\"1521\"\u003eAS3340 IC\u003c\/li\u003e\n\u003cli data-end=\"1546\" data-start=\"1535\"\u003eIC socket\u003c\/li\u003e\n\u003cli data-end=\"1571\" data-start=\"1549\"\u003eEurorack power cable\u003c\/li\u003e\n\u003cli data-end=\"1591\" data-start=\"1574\"\u003eMounting screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1622\" data-start=\"1593\"\u003eModulation \u0026amp; Sound Design\u003c\/h2\u003e\n\u003cp data-end=\"1902\" data-start=\"1623\"\u003eThe 3340 VCO provides a broad sonic range, from aggressive, harmonically rich textures to smooth and stable waveforms. With linear FM, multiple sync options, PWM control, and precise pitch tracking, it excels in both traditional analog synthesis and complex modular sound design.\u003c\/p\u003e\n\u003ch2 data-end=\"1928\" data-start=\"1904\"\u003eDIY Build \u0026amp; Assembly\u003c\/h2\u003e\n\u003cp data-end=\"2207\" data-start=\"1929\"\u003eThe PCB is clearly labeled to assist with assembly and calibration, and the pre-assembled SMD components significantly reduce build time and difficulty. All remaining components are through-hole and straightforward to install.\u003c\/p\u003e\n\u003cp data-end=\"2207\" data-start=\"1929\"\u003e\u003cmeta charset=\"utf-8\"\u003eNeed help with tuning and setup? Read the \u003ca title=\"The 3340 VCO: Calibration\" href=\"https:\/\/gurugarasynth.com\/blogs\/diy-electronics-your-starting-point-for-synth\/the-3340-vco-calibration\"\u003e\u003cstrong data-end=\"630\" data-start=\"600\"\u003e3340 VCO Calibration Guide\u003c\/strong\u003e\u003c\/a\u003e for step-by-step calibration instructions and tracking tips.\u003c\/p\u003e\n\u003cp data-end=\"2440\" data-start=\"2209\"\u003eThe front panel is made from high-quality PCB material with a black solder mask, factory-printed white markings, and gold-plated exposed copper, delivering a durable, modern, and professional appearance without screen printing.\u003c\/p\u003e\n\u003ch2 data-end=\"2470\" data-start=\"2442\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"2507\" data-start=\"2494\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003c\/li\u003e\n\u003cli data-end=\"2578\" data-start=\"2540\"\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e +12V: 15mA, −12V: 15mA\u003c\/li\u003e\n\u003cli data-end=\"2578\" data-start=\"2540\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 25mm\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2752\" data-start=\"2580\"\u003eThis full kit offers a complete, high-quality build experience and delivers the classic sound and flexibility of a 3340-based Eurorack VCO with a refined, modern aesthetic.\u003c\/p\u003e\n\u003ch2 data-end=\"2752\" data-start=\"2580\"\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\"\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"2752\" data-start=\"2580\"\u003eVideos\u003c\/h2\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2752\" data-start=\"2580\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/dOQWqyMa8Ic?si=nkLQfpGRayie2uy1\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"2752\" data-start=\"2580\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/xh2-Q0MjN9w?si=fQDfx-EZgT1vxNss\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":52797810540811,"sku":null,"price":89.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340-VCO-Full-DIY-Kit-01.jpg?v=1770364688"},{"product_id":"3340-vco-voltage-controlled-oscillator-fully-assembled-amp-calibrated","title":"3340 VCO (Voltage Controlled Oscillator) – Fully Assembled \u0026 Calibrated","description":"\u003cp data-start=\"276\" data-end=\"602\"\u003eThe 3340 VCO Eurorack module is a fully assembled and professionally calibrated voltage controlled oscillator based on the classic AS3340\/CEM3340 design. This ready-to-use module requires no DIY work and is delivered fully tested, making it ideal for musicians who want reliable analog performance straight out of the box.\u003c\/p\u003e\n\u003cp data-start=\"604\" data-end=\"896\"\u003eBuilt using the same high-quality PCB design as the DIY kits, this version features factory-assembled SMD components and carefully installed through-hole parts. Each unit is individually calibrated to ensure accurate 1V\/octave tracking, stable tuning, and consistent waveform performance.\u003c\/p\u003e\n\u003ch2 data-start=\"898\" data-end=\"914\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"917\" data-end=\"962\"\u003eFully assembled and calibrated Eurorack VCO\u003c\/li\u003e\n\u003cli data-start=\"965\" data-end=\"997\"\u003eClassic AS3340 oscillator core\u003c\/li\u003e\n\u003cli data-start=\"1000\" data-end=\"1051\"\u003eSquare, Triangle, Ramp, and Sine waveform outputs\u003c\/li\u003e\n\u003cli data-start=\"1054\" data-end=\"1086\"\u003eHard Sync and Soft Sync inputs\u003c\/li\u003e\n\u003cli data-start=\"1089\" data-end=\"1138\"\u003eLinear FM input with precise 1V\/octave tracking\u003c\/li\u003e\n\u003cli data-start=\"1141\" data-end=\"1206\"\u003eExternal CV control for pulse width modulation (PWM) (0 to +5V)\u003c\/li\u003e\n\u003cli data-start=\"1209\" data-end=\"1238\"\u003eStable tuning\u003c\/li\u003e\n\u003cli data-start=\"1241\" data-end=\"1263\"\u003e10HP Eurorack format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1265\" data-end=\"1288\"\u003eSound \u0026amp; Performance\u003c\/h2\u003e\n\u003cp data-start=\"1289\" data-end=\"1604\"\u003eThe 3340 VCO delivers a wide sonic range, from aggressive, harmonically rich analog tones to smooth and precise waveforms. Linear FM, PWM, and dual sync options allow for expressive modulation and complex patching, making this oscillator suitable for both classic subtractive synthesis and advanced modular systems.\u003c\/p\u003e\n\u003ch2 data-start=\"1606\" data-end=\"1632\"\u003eBuild Quality \u0026amp; Design\u003c\/h2\u003e\n\u003cp data-start=\"1633\" data-end=\"1931\"\u003eThis module is built on a high-quality PCB with a black PCB front panel featuring factory-printed white graphics and gold-plated exposed copper. The PCB panel construction ensures durability while giving the module a clean, modern appearance that integrates seamlessly into any Eurorack system.\u003c\/p\u003e\n\u003cp data-start=\"1933\" data-end=\"2035\"\u003eAll components are securely mounted, and the module is carefully inspected and tested before shipping.\u003c\/p\u003e\n\u003ch2 data-start=\"2037\" data-end=\"2062\"\u003eCalibration \u0026amp; Testing\u003c\/h2\u003e\n\u003cp data-start=\"2063\" data-end=\"2076\"\u003eEach unit is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2079\" data-end=\"2096\"\u003eFully assembled\u003c\/li\u003e\n\u003cli data-start=\"2099\" data-end=\"2152\"\u003eIndividually calibrated for accurate pitch tracking\u003c\/li\u003e\n\u003cli data-start=\"2155\" data-end=\"2207\"\u003eTested for waveform integrity and stable operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2280\" data-end=\"2308\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2311\" data-end=\"2329\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Eurorack\u003c\/li\u003e\n\u003cli data-start=\"2332\" data-end=\"2345\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10HP\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2388\" data-end=\"2426\"\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e +12V: 15mA, −12V: 15mA\u003c\/li\u003e\n\u003cli data-start=\"2388\" data-end=\"2426\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 25mm (Skiff Friendly)\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2428\" data-end=\"2693\"\u003eThe fully assembled and calibrated 3340 VCO is a dependable, high-quality analog oscillator that delivers classic sound, modern reliability, and immediate playability - perfect for performers, studio users, and modular enthusiasts who prefer a plug-and-play solution.\u003c\/p\u003e\n\u003ch2 data-start=\"2428\" data-end=\"2693\"\u003eSkiff Friendly Module\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"2428\" data-end=\"2693\"\u003eVideos\u003c\/h2\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/dOQWqyMa8Ic?si=nkLQfpGRayie2uy1\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-start=\"2428\" data-end=\"2693\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"2428\" data-end=\"2693\"\u003e \u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":52797817159947,"sku":null,"price":119.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340-VCO-Assembled-01_4f94a334-cda4-4005-b253-ce27f3674a84.jpg?v=1767115619"},{"product_id":"vco-vcf-complete-kit-bundle","title":"Analog Voice Starter Pack – 3340 VCO + Riot ST VCF Complete DIY Kits","description":"\u003cp data-end=\"699\" data-start=\"524\"\u003eBuild a powerful analog voice with depth, width, and character using this curated Eurorack bundle featuring the 3340 VCO Complete Kit and the Riot ST VCF Complete Kit.\u003c\/p\u003e\n\u003cp data-end=\"898\" data-start=\"701\"\u003eThis combination gives you the essential foundation of subtractive synthesis — a stable, classic 3340-based voltage-controlled oscillator paired with a warm, rich stereo analog low-pass filter.\u003c\/p\u003e\n\u003cp data-end=\"1276\" data-start=\"900\"\u003eWhile the 3340 VCO provides a solid and musical sound source, the Riot ST VCF expands it into the stereo field, offering expressive control over Frequency, Resonance, and Stereo Space. With its dedicated Stereo Space fader and CV input, you can create wide, animated filter movement from a single mono oscillator — turning simple waveforms into spacious, dynamic textures.\u003c\/p\u003e\n\u003ch2 data-end=\"1297\" data-start=\"1278\"\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1327\" data-start=\"1300\"\u003e3340 VCO Complete DIY Kit\u003c\/li\u003e\n\u003cli data-end=\"1360\" data-start=\"1330\"\u003eRiot ST VCF Complete DIY Kit\u003c\/li\u003e\n\u003cli data-end=\"1416\" data-start=\"1363\"\u003eAll required electronic components for both modules\u003c\/li\u003e\n\u003cli data-end=\"1482\" data-start=\"1419\"\u003eFactory pre-soldered SMD sections (no SMD soldering required)\u003c\/li\u003e\n\u003cli data-end=\"1515\" data-start=\"1485\"\u003eDetailed build documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1544\" data-start=\"1517\"\u003eWhy Choose This Bundle?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1611\" data-start=\"1548\"\u003eComplete analog voice foundation (Oscillator + Stereo Filter)\u003c\/li\u003e\n\u003cli data-end=\"1670\" data-start=\"1614\"\u003eExpressive stereo movement and modulation capabilities\u003c\/li\u003e\n\u003cli data-end=\"1725\" data-start=\"1673\"\u003eEasy-build format with pre-soldered SMD components\u003c\/li\u003e\n\u003cli data-end=\"1780\" data-start=\"1728\"\u003eIdeal starting point for a powerful Eurorack voice\u003c\/li\u003e\n\u003cli data-end=\"1841\" data-start=\"1783\"\u003eBetter value compared to purchasing both kits separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2114\" data-start=\"1843\"\u003eBoth kits are designed to streamline the build process. All essential SMD components are professionally assembled at the factory, leaving only through-hole (THT) components for installation — delivering a satisfying DIY experience without the complexity of SMD soldering.\u003c\/p\u003e\n\u003cp data-end=\"2372\" data-start=\"2116\"\u003eThe Riot ST VCF can process mono signals in stereo thanks to its internally linked inputs, allowing you to generate wide spatial movement from a single oscillator. Add a VCA, envelope generator, and power solution to complete a fully playable analog voice.\u003c\/p\u003e\n\u003ch2 data-end=\"2372\" data-start=\"2116\"\u003eBuild Documents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"3340 VCO Complete DIY Kitstep by step build guide\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340_Complete_Kit_Build_Guide.pdf?v=1770199145\" target=\"_blank\"\u003e3340 VCO Build Document\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Riot ST VCF complete DIY kit - Step by step build guide\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Riot_ST_VCF_Full_Kit_Build_Guide.pdf?v=1769618754\" target=\"_blank\"\u003eRiot ST VCF Build Document\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVideo\u003c\/h2\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/dOQWqyMa8Ic?si=lewGmcMWgeptiNNS\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/5zW-MT5aE7Q?si=X1-9B9fGgLrbtmp6\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":52882041733387,"sku":null,"price":169.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3340-VCO-_-Riot-ST-VCF-Bundle.jpg?v=1770364688"},{"product_id":"vca-iv-quad-ota-vca-complete-diy-eurorack-kit","title":"VCA IV: Quad OTA VCA - Complete DIY Eurorack Kit","description":"\u003cp class=\"MsoNormal\"\u003eThe VCA IV is a high-density, four-channel voltage-controlled amplifier designed for precision signal shaping and high-fidelity mixing. This Complete DIY Eurorack Kit offers a streamlined building experience, combining the precision of factory-assembled SMD components with the satisfaction of a hand-built module.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cb\u003eVersatile Quad Architecture \u0026amp; Stereo Pairing\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\"\u003eThe VCA IV is fundamentally designed as four individual OTA-based VCAs, each featuring its own signal input, CV input, and offset control. This makes it an ideal utility for managing four separate audio or CV sources simultaneously.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eBeyond its standard quad operation, the module is intelligently normalled to be used as two stereo pairs (VCA 1 \u0026amp; 2 and VCA 3 \u0026amp; 4). This architecture significantly simplifies complex stereo patching:\u003c\/p\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0cm;\"\u003e\n\u003cli style=\"mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStereo Signal Normalization:\u003c\/b\u003e Input 1 is connected to Input 2 via a switched jack (and Input 3 to 4). Patching a signal into Input 1 automatically sends it to Input 2, allowing for easy signal splitting or stereo processing.\u003c\/li\u003e\n\u003cli style=\"mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eDual-CV Normalization:\u003c\/b\u003e CV 1 is connected to CV 2 (and CV 3 to 4) via a switched jack. This allows a single CV source—such as an envelope or LFO—to control both VCAs in the pair simultaneously, ensuring perfectly synced level changes for stereo images.\u003c\/li\u003e\n\u003cli style=\"mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003ePrecision Balancing:\u003c\/b\u003e Each channel retains its own Offset knob, allowing you to fine-tune the balance between VCAs or \"center\" of a stereo image even when the CV control is shared.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cb\u003eVoltage-Controlled Mixing \u0026amp; Signal Control\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\"\u003eAll four channels are summed at the Mix Out, allowing the module to function as a compact voltage-controlled mixer.\u003c\/p\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0cm;\"\u003e\n\u003cli style=\"mso-list: l2 level1 lfo2; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eSwitched Outputs:\u003c\/b\u003e Plugging a cable into an individual VCA output removes that specific channel from the Mix Out.\u003c\/li\u003e\n\u003cli style=\"mso-list: l2 level1 lfo2; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eClean Mixing Pro-Tip:\u003c\/b\u003e Because of the internal normalizations, unused channels can sometimes bleed into the Mix Out. To keep your mix clean, simply turn the\u003cb\u003e Offset pot all the way down\u003c\/b\u003e for any channel not currently in use to avoid unwanted signal bleed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cb\u003eEffortless DIY Build: No Calibration Required\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\"\u003eThe VCA IV is one of the most accessible Eurorack DIY kits on the market. It is very easy to build, as all surface-mount (SMD) components are pre-assembled at the factory.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eYou only need to solder the through-hole (THT) parts, such as the jack sockets, potentiometers, and the power socket. Best of all, the circuit is designed for immediate \"plug and play\" use - no calibration or trimming is needed once the soldering is complete.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cb\u003eKey Features \u0026amp; Specifications\u003c\/b\u003e\u003c\/h2\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0cm;\"\u003e\n\u003cli style=\"mso-list: l1 level1 lfo3; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003e4 Independent OTA VCAs:\u003c\/b\u003e Optimized for audio and fast modulation.\u003c\/li\u003e\n\u003cli style=\"mso-list: l1 level1 lfo3; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStereo Ready:\u003c\/b\u003e Normalled inputs and CV for VCA pairs 1\/2 and 3\/4.\u003c\/li\u003e\n\u003cli style=\"mso-list: l1 level1 lfo3; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eBuilt-in Summing:\u003c\/b\u003e Dedicated Mix Output for sub-mixing.\u003c\/li\u003e\n\u003cli style=\"mso-list: l1 level1 lfo3; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eAesthetic Design:\u003c\/b\u003e Black PCB front panel with white and gold-plated copper artwork.\u003c\/li\u003e\n\u003cli style=\"mso-list: l1 level1 lfo3; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eBeginner Friendly:\u003c\/b\u003e Pre-soldered SMD; only THT components required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\u003cb\u003eWhat’s in the Box?\u003c\/b\u003e\u003c\/h2\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0cm;\"\u003e\n\u003cli style=\"mso-list: l3 level1 lfo4; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eVCA IV PCB\u003c\/b\u003e (Factory-assembled SMD)\u003c\/li\u003e\n\u003cli style=\"mso-list: l3 level1 lfo4; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eFront Panel\u003c\/b\u003e (Black, White, and Gold artwork)\u003c\/li\u003e\n\u003cli style=\"mso-list: l3 level1 lfo4; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eComplete THT Component Set\u003c\/b\u003e (Jack sockets, Potentiometers, Power socket)\u003c\/li\u003e\n\u003cli style=\"mso-list: l3 level1 lfo4; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\u003cb\u003e10-to-16 pin Ribbon Power Cable\u003c\/b\u003e\u003c\/li\u003e\n\u003cli style=\"mso-list: l3 level1 lfo4; tab-stops: list 36.0pt;\" class=\"MsoNormal\"\u003e\u003cb\u003eM3 Mounting Screws\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2308\" data-start=\"2280\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"2329\" data-start=\"2311\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEurorack\u003c\/li\u003e\n\u003cli data-end=\"2345\" data-start=\"2332\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10HP\u003c\/li\u003e\n\u003cli data-end=\"2426\" data-start=\"2388\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e25mm (Skiff Friendly)\u003c\/li\u003e\n\u003cli data-end=\"2426\" data-start=\"2388\"\u003e\n\u003cstrong data-start=\"375\" data-end=\"392\"\u003eCurrent Draw:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli data-start=\"399\" data-end=\"412\"\u003e+12V: 35 mA\u003c\/li\u003e\n\u003cli data-start=\"417\" data-end=\"430\"\u003e−12V: 35 mA\u003c\/li\u003e\n\u003cli data-start=\"435\" data-end=\"446\"\u003e+5V: 0 mA\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Photo of a Eurorack module taken from the side to show the depth of the modules. Skiff Friendly.\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\"\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":52980780171531,"sku":null,"price":69.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/VCA-IV-Complete-kit-01.jpg?v=1773852679"},{"product_id":"vca-iv-quad-ota-vca-assembled","title":"VCA IV: Quad OTA VCA - Assembled","description":"\u003ch2 data-path-to-node=\"0\"\u003eVCA IV: Quad OTA VCA - Assembled\u003c\/h2\u003e\n\u003cp data-path-to-node=\"1\"\u003eThe\u003cstrong\u003e \u003c\/strong\u003eVCA IV is a high-performance, four-channel voltage-controlled amplifier designed for precision signal shaping and mixing. This fully assembled module comes ready to install, offering a compact and powerful solution for managing audio levels in your Eurorack system.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,0,0\"\u003e4 Independent OTA-based VCAs:\u003c\/b\u003e High-performance signal path optimized for audio and fast modulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,1,0\"\u003eStereo-Ready Architecture:\u003c\/b\u003e Intelligently normalled inputs and CV for seamless paired operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,2,0\"\u003eBuilt-in Summing Mixer:\u003c\/b\u003e Dedicated Mix Out sums all four channels into a single signal path.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,3,0\"\u003eSwitched Outputs:\u003c\/b\u003e Patching into an individual VCA Out automatically removes that channel from the mix.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,4,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,4,0\"\u003ePlug-and-Play:\u003c\/b\u003e Fully assembled, tested, and factory-calibrated for immediate use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,5,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,5,0\"\u003ePremium Aesthetics:\u003c\/b\u003e Black PCB front panel featuring signature white and gold-plated copper artwork.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"5\"\u003eVersatile Quad \u0026amp; Stereo Operation\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe VCA IV is fundamentally designed as four individual VCAs, each equipped with its own signal input, CV input, and offset control. The offset knob allows for manual adjustment of the base amplification level before external CV is applied.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003eBeyond standard quad operation, the module features internal normalizations that allow it to excel as two stereo pairs (VCA 1 \u0026amp; 2 and VCA 3 \u0026amp; 4):\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,0,0\"\u003eInput Normalization:\u003c\/b\u003e Input 1 is normalled to Input 2 (and 3 to 4) via a switched jack. Patching a mono signal into Input 1 automatically sends it to both VCAs in the pair.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,1,0\"\u003eCV Normalization:\u003c\/b\u003e CV 1 is normalled to CV 2 (and 3 to 4). This allows a single envelope or LFO to control the dynamics of a stereo image with perfect synchronization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,2,0\"\u003eStereo Balancing:\u003c\/b\u003e Even when using a single CV source, each channel retains an independent\u003cstrong\u003e \u003c\/strong\u003eOffset knob, allowing you to fine-tune the center balance of your stereo field.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"9\"\u003eVoltage-Controlled Mixing\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eAll four channels are summed at the Mix Out, enabling the module to function as a compact voltage-controlled mixer.\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,0,0\"\u003eSignal Integrity:\u003c\/b\u003e Because the internal stereo connections can add signals to the mix, simply turn the Offset pot all the way down for any unused channels to ensure a clean, bleed-free output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,1,0\"\u003eDynamic Sub-mixing:\u003c\/b\u003e The switched jack architecture allows you to peel off individual channels for processing while the remaining signals stay in the main mix.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"13\"\u003eDesign \u0026amp; Hardware\u003c\/h2\u003e\n\u003cp data-path-to-node=\"14\"\u003eThe VCA IV follows the premium visual style of Guru Gara Synth factory designs, featuring a durable black PCB front panel with white and gold-plated copper artwork.\u003c\/p\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eIncluded in the Box:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"16,0,0\"\u003e1x Fully Assembled VCA IV Module\u003c\/li\u003e\n\u003cli data-path-to-node=\"16,1,0\"\u003e1x 10-to-16 pin Ribbon Power Cable\u003c\/li\u003e\n\u003cli data-path-to-node=\"16,2,0\"\u003e4x M3 Mounting Screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2308\" data-start=\"2280\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"2329\" data-start=\"2311\"\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEurorack\u003c\/li\u003e\n\u003cli data-end=\"2345\" data-start=\"2332\"\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10HP\u003c\/li\u003e\n\u003cli data-end=\"2426\" data-start=\"2388\"\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e25mm (Skiff Friendly)\u003c\/li\u003e\n\u003cli data-end=\"2426\" data-start=\"2388\"\u003e\n\u003cstrong data-end=\"392\" data-start=\"375\"\u003eCurrent Draw:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli data-end=\"412\" data-start=\"399\"\u003e+12V: 35 mA\u003c\/li\u003e\n\u003cli data-end=\"430\" data-start=\"417\"\u003e−12V: 35 mA\u003c\/li\u003e\n\u003cli data-end=\"446\" data-start=\"435\"\u003e+5V: 0 mA\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Photo of a Eurorack module taken from the side to show the depth of the modules. Skiff Friendly.\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/Skiff-Friendly-Module.jpg?v=1768904420\"\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":52980812546315,"sku":null,"price":99.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/VCA-IV-01_4d80181d-9785-4097-8ae4-5e0dff497735.jpg?v=1773855414"},{"product_id":"b-stock-3350-multimode-vcf-pcb-panel-kit","title":"[B-Stock] 3350 Multimode VCF – PCB \u0026 Panel Kit","description":"\u003cp data-path-to-node=\"4\"\u003e\u003cb data-path-to-node=\"4\" data-index-in-node=\"0\"\u003eThe sound is perfect. The panel isn't.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eThis is a B-Stock PCB + Front Panel kit for our 3350 Multimode VCF. The PCB is 100% functional and ready for your components, but the front panel features minor cosmetic defects-such as surface scratches or silkscreen inconsistencies.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"6,0,0\"\u003e\n\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eThe Deal:\u003c\/b\u003e 50% OFF the standard kit price.\u003c\/li\u003e\n\u003cli data-path-to-node=\"6,1,0\"\u003e\n\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eThe Condition:\u003c\/b\u003e Fully functional electronics. Minor cosmetic flaws on the panel.\u003c\/li\u003e\n\u003cli data-path-to-node=\"6,2,0\"\u003e\n\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eWhat’s Included:\u003c\/b\u003e High-quality 3350 PCB and \"B-Stock\" Front Panel. (Components not included).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"7\"\u003eIf you care more about the 3350 filter peaks than a flawless finish, this is the best way to add the 3350 to your rack.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e\u003ca href=\"https:\/\/gurugarasynth.com\/products\/3350-multimode-vcf-eurorack-pcb-and-front-panel\" title=\"3350 Multimode VCF - PCB and Front Panel for Eurorack Modular Synth\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003e[Link to standard 3350 VCF for full specs and demos]\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003ci data-path-to-node=\"9\" data-index-in-node=\"0\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: B-Stock sales are final. Sold as-is regarding cosmetic condition.\u003c\/i\u003e\u003c\/p\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":53033223291147,"sku":null,"price":9.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/3350-VCF-B-Stock-01_e4f81014-2eda-4d64-b52e-5f4c5b1d76c1.jpg?v=1778052474"},{"product_id":"b-stock-3310-vc-adsr-pcb-and-front-panel-kit","title":"[B-Stock] 3310 VC-ADSR PCB and Front Panel Kit","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eThe performance is perfect. The finish isn't.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eThis is a B-Stock PCB + Front Panel kit for our 3310 VC-ADSR. While the electronics are 100% perfect and ready for your build, the front panel features minor cosmetic defects—such as surface scratches, slight scuffs, or silkscreen inconsistencies.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"3,0,0\"\u003e\n\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eThe Deal:\u003c\/b\u003e 50% OFF the standard kit price.\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,1,0\"\u003e\n\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003eThe Condition:\u003c\/b\u003e Fully functional electronics. Minor cosmetic flaws on the panel.\u003c\/li\u003e\n\u003cli data-path-to-node=\"3,2,0\"\u003e\n\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003eWhat’s Included:\u003c\/b\u003e High-quality 3310 VC-ADSR PCB and \"B-Stock\" Front Panel. (Components not included).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eIf you’re looking for snappy 3310 transients and deep modulation options rather than a pristine collector's finish, this is the most affordable way to get a voltage-controlled envelope into your rack.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"6\"\u003eAbout the 3310 VC-ADSR\u003c\/h2\u003e\n\u003cp data-path-to-node=\"7\"\u003eThe 3310 is a classic DIY voltage-controlled envelope generator based on the legendary CEM3310 \/ AS3310 IC. It provides precise envelope shaping with CV control over every stage, making it a powerhouse for dynamic, expressive patching.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"8\"\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9,0,0\"\u003e\n\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eComplete Control:\u003c\/b\u003e Attack, Decay, Sustain, and Release controls.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,1,0\"\u003e\n\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eVoltage Modulation:\u003c\/b\u003e CV inputs with dedicated amount knobs for each stage.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,2,0\"\u003e\n\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eVisual Feedback:\u003c\/b\u003e Integrated LED display to monitor the envelope shape in real-time.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,3,0\"\u003e\n\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eSmart Gating:\u003c\/b\u003e External gate input or gate-via-bus (selectable via ribbon cable).\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,4,0\"\u003e\n\u003cb data-path-to-node=\"9,4,0\" data-index-in-node=\"0\"\u003eForm Factor:\u003c\/b\u003e 10HP width; 25mm depth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003ca href=\"https:\/\/gurugarasynth.com\/products\/3310-vc-adsr-voltage-controlled-envelope-generator-eurorack\" title=\"3310 VC-ADSR - PCB and Front Panel kit for Eurorack modular synth.\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003e[Link to standard 3310 VC-ADSR for full specs and build documents]\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cblockquote data-path-to-node=\"11\"\u003e\n\u003cp data-path-to-node=\"11,0\"\u003e\u003cb data-path-to-node=\"11,0\" data-index-in-node=\"0\"\u003eNote:\u003c\/b\u003e\u003cem\u003e B-Stock sales are final. Sold as-is regarding cosmetic condition. Limited quantities available.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Guru Gara Synth","offers":[{"title":"Default Title","offer_id":53045910438155,"sku":null,"price":9.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7049\/2427\/files\/B-Stock-3310-VC-ADSR-01.jpg?v=1776180204"}],"url":"https:\/\/gurugarasynth.com\/collections\/10hp-modules.oembed","provider":"Guru Gara Synth","version":"1.0","type":"link"}