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![Doepfer A-111-4 Quad Precision VCO [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-111-4_Quad_Precision_VCO_-_Standard_Edition_U23-37720_01.webp "Doepfer A-111-4 Quad Precision VCO [USED]")
![Doepfer A-110-2V Basic VCO (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-110-2_U23-37573_01.webp "Doepfer A-110-2V Basic VCO (Vintage Edition) [USED]")
![Doepfer A-106-5SE 12dB SEM VCF Filter (Special Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-106-5_12dB_SEM_VCF_Special_Edition_Creme_U23-37748_01.webp "Doepfer A-106-5SE 12dB SEM VCF Filter (Special Edition) [USED]")
![Doepfer A-157-1 8x16 Trigger Sequencer Matrix [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-157-1_U23-37934_01.webp "Doepfer A-157-1 8x16 Trigger Sequencer Matrix [USED]")
![Doepfer A-145-4V Quad LFO (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-145-4v_Quad_LFO_Slim_Line_-_Vintage_Edition_U23-37134_01_1.webp "Doepfer A-145-4V Quad LFO (Vintage Edition) [USED]")
![Doepfer A-138sV Mini Stereo Mixer (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-138sv_Mini_Stereo_Mixer_-_Vintage_Edition_U23-37299_01_1.webp "Doepfer A-138sV Mini Stereo Mixer (Vintage Edition) [USED]")
![Doepfer A-130 Linear VCA [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-130_Linear_VCA_U23-37122_01_1.webp "Doepfer A-130 Linear VCA [USED]")
8hp USED
![Doepfer A-145 LFO [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-145_LFO_U23-37126_01.webp "Doepfer A-145 LFO [USED]")
$79.99
In stock
8hp USED
![Doepfer A-145 LFO [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-145_LFO_U23-37127_01.webp "Doepfer A-145 LFO [USED]")
$79.99
In stock
![Doepfer A-144 Morphing Controller [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-144_Morphing_Controller_U23-37133_01.webp "Doepfer A-144 Morphing Controller [USED]")
![Doepfer A-136 Distortion Waveshaper [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-136_Distortion_Waveshaper_U23-37131_01.webp "Doepfer A-136 Distortion Waveshaper [USED]")
![Doepfer A-135-2 Quad VCA / Mixer [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-135-2_Quad_VCA_Mixer_-_Standard_Edition_U23-37184_01.webp "Doepfer A-135-2 Quad VCA / Mixer [USED]")
![Doepfer A-130 Linear VCA [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-130_Linear_VCA_U23-37123_01.webp "Doepfer A-130 Linear VCA [USED]")
![Doepfer A-130 Linear VCA [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-130_Linear_VCA_U23-37124_01.webp "Doepfer A-130 Linear VCA [USED]")
![Doepfer A-110-6 Trapezoid Thru-Zero Quadrature VCO [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-110-6_Trapezoid_Thru_Zero_Quadrature_VCO_U23-37128_01.webp "Doepfer A-110-6 Trapezoid Thru-Zero Quadrature VCO [USED]")
![Doepfer A-190-4 USB/MIDI-to-CV/Gate Interface [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-190-4_USB_MIDI-to-CV_Gate_Interface_U23-36975_01.webp "Doepfer A-190-4 USB/MIDI-to-CV/Gate Interface [USED]")
![Doepfer A-190-3V USB / MIDI-to-CV / Gate Interface (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-190-3V_USB_MIDI-to-CV_Interface_-_Vintage_Edition_U23-36995_01.webp "Doepfer A-190-3V USB / MIDI-to-CV / Gate Interface (Vintage Edition) [USED]")
![Doepfer A-178 Theremin Control Voltage Source [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-178_Theremin_CV_Source_-_Standard_Edition_U23-37226_01.webp "Doepfer A-178 Theremin Control Voltage Source [USED]")
![Doepfer A-156 Dual Quantizer [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-156_Dual_Quantizer_-_Standard_Edition_U23-37098_01.webp "Doepfer A-156 Dual Quantizer [USED]")
![Doepfer A-145-4V Quad LFO (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-145-4v_Quad_LFO_Slim_Line_-_Vintage_Edition_U23-36987_01.webp "Doepfer A-145-4V Quad LFO (Vintage Edition) [USED]")
![Doepfer A-124SE VCF5 Wasp Filter (Special Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-124SE_VCF5_Wasp_Filter_Special_Edition_U23-36962_01.webp "Doepfer A-124SE VCF5 Wasp Filter (Special Edition) [USED]")
![Doepfer A-120V VCF1 24dB Low Pass Filter (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-120v_VCF1_24dB_Low_Pass_Filter_-_Vintage_Edition_U23-37234_01.webp "Doepfer A-120V VCF1 24dB Low Pass Filter (Vintage Edition) [USED]")
![Doepfer A-106-1 X-Treme Filter [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-106-1_X-Treme_Filter_U23-36960_01.webp "Doepfer A-106-1 X-Treme Filter [USED]")
![Doepfer A-106-1 X-Treme Filter [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-106-1_X-Treme_Filter_U23-36961_01.webp "Doepfer A-106-1 X-Treme Filter [USED]")
![Doepfer A-166 Dual Logic [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-166_Dual_Logic_U23-36883_01.webp "Doepfer A-166 Dual Logic [USED]")
![Doepfer A-160-5 Voltage Controlled Clock Multiplier / Ratcheting Controller [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-160-5_VC_Clock_Multiplier_-_Standard_Edition_U23-36814_01.webp "Doepfer A-160-5 Voltage Controlled Clock Multiplier / Ratcheting Controller [USED]")
![Doepfer A-124SE VCF5 Wasp Filter (Special Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-124SE_VCF5_Wasp_Filter_Special_Edition_U23-36897_01.webp "Doepfer A-124SE VCF5 Wasp Filter (Special Edition) [USED]")
![Doepfer A-105-2 24dB SSI Low Pass Filter Standard Edition [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-105-2_24_dB_Low_Pass_SSI-Type_Filter_U23-36628_01.webp "Doepfer A-105-2 24dB SSI Low Pass Filter Standard Edition [USED]")
![Doepfer A-142-4 Quad Decay Envelope Generator [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-142-4_Quad_Decay_U23-36454_01.webp "Doepfer A-142-4 Quad Decay Envelope Generator [USED]")
![Doepfer A-118 Noise + Random Voltage [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-118_Noise___Random_Voltage_-_Standard_Edition_U23-36556_01.webp "Doepfer A-118 Noise + Random Voltage [USED]")
![Doepfer A-138nV Slim Line Mixer (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-138nV_Mixer_Slim_Line_-_Vintage_Edition_U23-36383_01.webp "Doepfer A-138nV Slim Line Mixer (Vintage Edition) [USED]")
![Doepfer A-100 LC9V Low Cost Eurorack Case - 9U / 84HP (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-100LC9V_Low_Cost_Case_-_9U_Black_w__IEC_Cable_U23-36486_01.webp "Doepfer A-100 LC9V Low Cost Eurorack Case - 9U / 84HP (Vintage Edition) [USED]")
![Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-100_G6_Rackmountable_Case_-_6U_w__IEC_Cable_U23-35785_01_2.webp "Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]")
![Doepfer A-190-3 USB / MIDI-to-CV / Gate Interface [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-190-3_USB_MIDI-to-CV_Interface_-_Standard_Edition_U23-35773_01.webp "Doepfer A-190-3 USB / MIDI-to-CV / Gate Interface [USED]")
![Doepfer A-161 Clock / Trigger Sequencer [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-161_Clock___Trigger_Sequencer_U23-35623_01.webp "Doepfer A-161 Clock / Trigger Sequencer [USED]")
![Doepfer A-160-1 Clock + Trigger Divider [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-160-1_Clock___Trigger_Divider_U23-35622_01.webp "Doepfer A-160-1 Clock + Trigger Divider [USED]")
![Doepfer A-137-2 Wave Multiplier II [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-137-2_Wave_Multiplier_II_U23-35626_01.webp "Doepfer A-137-2 Wave Multiplier II [USED]")
![Doepfer A-137-2 Wave Multiplier II [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-137-2_Wave_Multiplier_II_U23-35627_01.webp "Doepfer A-137-2 Wave Multiplier II [USED]")
![Doepfer A-137-1 Wave Multiplier I [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-137-1_Wave_Multiplier_I_U23-35625_01.webp "Doepfer A-137-1 Wave Multiplier I [USED]")
![Doepfer A-118 Noise + Random Voltage [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-118_Noise___Random_Voltage_-_Standard_Edition_U23-35621_01.webp "Doepfer A-118 Noise + Random Voltage [USED]")
![Doepfer A-112V Sampler (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-112V_Sampler_-_Vintage_Edition_U23-33130_01.webp "Doepfer A-112V Sampler (Vintage Edition) [USED]")
![Doepfer A-156V Quantizer (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-156V_Dual_Quantizer_-_Vintage_Edition_U23-35544_01.webp "Doepfer A-156V Quantizer (Vintage Edition) [USED]")
![Doepfer A-121-2V 12dB Multimode Filter (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-121-2v_12dB_Multimode_Filter_-_Vintage_Edition_U23-35538_01.webp "Doepfer A-121-2V 12dB Multimode Filter (Vintage Edition) [USED]")
![Doepfer A-111-2V High End VCO II / LFO (Vintage Edition) [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-111-2v_High_End_VCO_II_-_Vintage_Edition_U23-35530_01.webp "Doepfer A-111-2V High End VCO II / LFO (Vintage Edition) [USED]")
![Doepfer A-109 VC Signal Processor [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-109_VC_Signal_Processor_U23-35348_01.webp "Doepfer A-109 VC Signal Processor [USED]")
![Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-100_G6_Rackmountable_Case_-_6U_w__IEC_Cable_U23-35629_01.webp "Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]")
![Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]](https://www.perfectcircuit.com/media/catalog/product/cache/ded690e21f7abf5f4eba2c2c5d3bf323/D/o/Doepfer_A-100_G6_Rackmountable_Case_-_6U_w__IEC_Cable_U23-35630_01.webp "Doepfer A-100 G6 Rackmountable Eurorack Case - 6U / 84HP [USED]")
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Famed for conceiving the Eurorack format, Doepfer are primarily recognized for their synthesizer hardware, which includes modular systems, MIDI controllers, MIDI sequencers, MIDI-to-CV interfaces, and specialized MIDI devices. Without a doubt, Doepfer possesses the most extensive offering of modules available from any manufacturer, with over 200 modules in all!
Founder Dieter Döpfer began developing hardware in the late ‘70s. From there, his focus throughout much of the ‘80s centered on MIDI equipment. In 1992, Döpfer collaborated with electronic music legends Kraftwerk to develop the MAQ16/3, a MIDI-equipped analog sequencer. Doepfer’s designs have inspired a myriad of artists and engineers alike, with several Eurorack manufacturers candidly citing Doepfer products as the reason they ventured into the business in the first place. Some of their most acclaimed modules include the A-119 External Input/Envelope Follower, A-124 VCF5 Wasp Filter (based on the filter circuit from Electronic Dream Plant’s EDP Wasp), the A-152 Voltage Addressed T&H/Switch, the A-178 Theremin Control Voltage Source, and the A-196 Phase Locked Loop.
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