Eurorack + Modular Synths

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  1. Expert Sleepers FHX-8CV FH-2 Factotum Expander
    Expert Sleepers FHX-8CV FH-2 Expander 4hp
    $145.00

    In Stock Available immediately!
  2. A-198 Trautonium Manual / Ribbon Controller
    Doepfer A-198 Trautonium Manual / Ribbon Controller 8hp
    $290.00

    In Stock Available immediately!
  3. Expert Sleepers CVM-8
    Expert Sleepers CVM-8 CV to MIDI + I2C Converter 4hp
    $225.00

    In Stock Available immediately!
  4. Doepfer A-174-4 3D Joystick
    Doepfer A-174-4 3D Joystick 12hp
    As low as $189.00
    Multiple Options Make a selection for stock info
  5. ES-5 mk3 Expander for ES-3
    Expert Sleepers ES-5 mk3 Expander for ES-3 4hp
    $125.00

    In Stock Available immediately!
  6. Doepfer A-178 Theremin Control Voltage Source
    Doepfer A-178 Theremin Control Voltage Source 8hp
    As low as $110.00
    Multiple Options Make a selection for stock info
  7. ESX-8CV Mk2 Expansion
    Expert Sleepers ESX-8CV Mk2 Expansion 4hp
    $175.00

    In Stock Available immediately!
  8. Expert Sleepers Tiny MIDI Breakout Expander
    Expert Sleepers Tiny MIDI Breakout Expander 2hp
    $55.00

    In Stock Available immediately!
  9. vpme.de QEX Quad Drum Expander
    vpme.de QEX Quad Drum Expander 4hp
    $140.00

    In Stock Available immediately!
  10. Expert Sleepers ES-7 mk2
    Expert Sleepers ES-7 CV Input Expander 4hp
    $99.00

    In Stock Available immediately!
  11. Doepfer A-154 Sequencer Controller
    Doepfer A-154 Sequencer Controller 22hp
    As low as $218.00
    Multiple Options Make a selection for stock info
  12. Expert Sleepers FHX-8GT Gate Expander for FH-2 Factotum
    Expert Sleepers FHX-8GT Gate Expander for FH-2 4hp
    $99.00

    Backorder Reserve your order today!

    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  13. Doepfer A-197-3 RGB LED Controller
    Doepfer A-197-3 RGB LED Controller 4hp
    $89.99

    In Stock Available immediately!
  14. ESX-8MD MIDI & DINsync Expansion
    Expert Sleepers ESX-8MD MIDI & DINsync Expansion 10hp
    $160.00

    In Stock Available immediately!
  15. Six Switches Expander for Euclidean Circles
    vpme.de Six Switches Expander for Euclidean Circles 2hp
    $61.99

    In Stock Available immediately!
  16. A-177-2 Foot Controllers
    Doepfer A-177-2 Foot Controllers 4hp
    $60.00

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    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  17. Doepfer A-198 Trautonium Ribbon Only
    Doepfer A-198 Trautonium Controller (Ribbon Only)
    $200.00

    In Stock Available immediately!
  18. Expert Sleepers MIDI Breakout Expander
    Expert Sleepers MIDI Breakout Expander 4hp
    $50.00

    In Stock Available immediately!
  19. A-173-1/2 Micro Keyboard / Manual Gate
    Doepfer A-173-1/2 Micro Keyboard / Manual Gate 12hp
    $199.99

    In Stock Available immediately!
  20. Expert Sleepers ESX-8GT mk3 Gate Expansion front view
    Expert Sleepers ESX-8GT mk3 Gate Expansion 4hp
    $75.00

    In Stock Available immediately!
  21. A-174-2 Wheels
    Doepfer A-174-2 Wheels 14hp
    $92.00

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    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  22. A-161 Clock / Trigger Sequencer
    Doepfer A-161 Clock / Trigger Sequencer 4hp
    $80.00

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    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  23. A-198m Trautonium Controller (Module Only)
    Doepfer A-198m Trautonium Controller (Module Only) 8hp
    $90.00

    In Stock Available immediately!
  24. Doepfer A-179-2 Light-Controlled CV/Gate Source
    Doepfer A-179-2 Light-Controlled CV/Gate Source 4hp
    $89.00

    Backorder Reserve your order today!

    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  25. ES-40 SPDIF Interface
    Expert Sleepers ES-40 SPDIF Interface 6hp
    $125.00

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    Out of Stock

    We're awaiting our next batch of this item. Pre-order to reserve your place in line and we'll fulfill your order as soon as we receive our shipment
  26. Doepfer’s A-149-2 is an essential expansion module for the A-149-1 Quantized/Stored Random Voltages.
    Doepfer A-149-2 Digital Random Voltages 4hp
    $74.99

    In Stock Available immediately!
  27. A-126-2exp Frequency Shifter Expander
    Doepfer A-126-2exp Frequency Shifter Expander 2hp
    As low as $59.99
    Multiple Options Make a selection for stock info
  28. Save $20 Doepfer A-154 Sequencer Controller
    Doepfer A-154 Sequencer Controller 22hp
    • DEMO
    • Sale
    $218.00 $198.00
    In Stock Available immediately!
  29. Doepfer A-126-2expV Frequency Shifter Expander [USED]
    Doepfer A-126-2expV Frequency Shifter Expander (Black) 2hp
    • USED
    $49.99

    In Stock Available immediately!
  30. Doepfer A-174-4 3D Joystick [USED]
    Doepfer A-174-4 3D Joystick 12hp
    • USED
    $159.00

    In Stock Available immediately!

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Modular synths are one of the most inspiring tools available to electronic musicians today: synthesizers that you can assemble yourself from core components, building an instrument specifically meant for your music and your workflow. These core components, called modules, each perform an individual function. Some generate sound, some process sound, and some provide a way to control other modules.

At Perfect Circuit we specialize in the Eurorack format of modular synthesizers, a standard developed by Dieter Doepfer in order to provide musicians easy and affordable access to the techniques from the large analog synths of yesteryear: Moog, Buchla, ARP, and Serge systems, and many more. Since then, Eurorack has grown considerably—now offering a wide range of unique sonic opportunities.

Now, manufacturers like Verbos Electronics and Random*Source focus on adapting classic analog designs for use in modern music. Others, like Noise Engineering, Industrial Music Electronics, or Mutable Instruments, work in the digital realm to bring new techniques to the world of hardware. Others like Rossum Electro-Music and Make Noise work in both domains to make instruments that strike an uncanny balance between analog and digital, opening new worlds of expression.

Through some combination of these modules, a mess of patch cables, and a healthy does of experimentation, many musicians have found their own unique voices: and perhaps you will find yours there, too.