Eurorack + Modular Synths

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  1. OXI Instruments Pipe MKII
    OXI Instruments Pipe MKII Eurorack Breakout for OXI One MKII 6hp
    • NEW
    $110.00

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  2. Boredbrain Music Xcelon Xi3 Expander
    Boredbrain Music Xcelon Xi3 Expander
    • NEW
    $269.00

    In Stock Available immediately!
  3. Boredbrain Music Xcelon Cue Expander
    Boredbrain Music Xcelon Cue Expander
    • NEW
    $249.00

    In Stock Available immediately!
  4. OHM Force Bohm Groove Sequence Expander
    OHM Force Bohm Groove Sequence Expander 10hp
    • NEW
    $149.00

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    We're awaiting our full initial batch of this item—pre-order to reserve your place in line! Customer orders are fulfilled in the order in which they are received.
  5. 4U Shop DHO
    4U Shop DHO Harmonic Osc Card Expander for Buchla Music Easel
    • NEW
    $249.00

    In Stock Available immediately!
  6. Sequentix Cirklon Eurorack Breakout
    Sequentix Cirklon Eurorack Breakout 14hp
    As low as $249.00
    Multiple Options Make a selection for stock info
  7. Squarp xp32 Expander for Hermod+
    Squarp xp32 Expander for Hermod+ 14hp
    • NEW
    $559.00

    In Stock Available immediately!
  8. Timo Rozendal Thresh Trigger Sequencer
    Timo Rozendal Thresh Trigger Sequencer 6hp
    • NEW
    $159.99

    In Stock Available immediately!
  9. OHM Force Bohm Performer Performance Expander
    OHM Force Bohm Performer Performance Expander 8hp
    • NEW
    $109.00

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    We're awaiting our full initial batch of this item—pre-order to reserve your place in line! Customer orders are fulfilled in the order in which they are received.
  10. Expert Sleepers FHX-8CV FH-2 Factotum Expander
    Expert Sleepers FHX-8CV FH-2 Expander 4hp
    $159.00

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  11. After Later Audio Barback
    After Later Audio Barback V2 Channel Expander for Bartender 10hp
    $160.00

    In Stock Available immediately!
  12. ALM Busy Circuits Axon-2
    ALM Busy Circuits Axon-2 Expander for ALM Modules 8hp
    $210.00

    In Stock Available immediately!
  13. ALM PPexp1 Pamela's Pro Workout Expander
    ALM Busy Circuits PPexp1 Pamela's Pro Workout Expander 4hp
    $155.00

    In Stock Available immediately!
  14. New Systems Instruments A/B/C Expander
    New Systems Instruments Discrete Map A/B/C Expander 10hp
    $199.00

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  15. Intellijel Designs CVx Expander Module
    Intellijel Designs CVx Expander Module 14hp
    $179.00

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  16. Instruo DivKid øchd Expander
    Instruo DivKid øchd Expander 4hp
    $129.00

    In Stock Available immediately!
  17. XAOC Devices Gera Binary Product Commander
    XAOC Devices Gera Binary Product Commander 6hp
    $199.00

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  18. 4U Shop IO
    4U Shop IO Passive IO Card Expander for Buchla Music Easel
    • NEW
    $189.00

    In Stock Available immediately!
  19. Making Sound Machines Plinky Expander
    Making Sound Machines Plinky Expander 2hp
    • NEW
    $89.99

    In Stock Available immediately!
  20. 4MS MetaAIO Expander for MetaModule
    4MS MetaAIO Expander for MetaModule 6hp
    $165.00

    In Stock Available immediately!
  21. Sdkc Instruments Addition Expander for Helical
    Sdkc Instruments Addition Expander for Helical 4hp
    $119.00

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  22. ZORX 1U CV Bus Silencer Expander MK II
    ZORX Electronics 1U CV Bus Silencer Expander MK II 20hp
    • NEW
    $167.00

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  23. Rossum Locutus
    Rossum Locutus MIDI Mediator Expander for Assimil8or 6hp
    As low as $229.00
    Multiple Options Make a selection for stock info
  24. XAOC Devices Arad Resonator Commander
    XAOC Devices Arad Resonator Commander 6hp
    • NEW
    $149.00

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  25. XAOC Devices Jena Binary Transfunctioner
    XAOC Devices Jena Binary Transfunctioner 8hp
    $324.99

    In Stock Available immediately!
  26. Shakmat Modular Bard Quartet Expander
    Shakmat Modular Bard Quartet Expander 2hp
    $129.99

    In Stock Available immediately!
  27. XAOC Devices NIN Zadar Expander
    XAOC Devices NIN Zadar Expander 3hp
    $79.99

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  28. 4U Shop Buddy
    4U Shop Buddy Breadboard Card Expander for Buchla Music Easel
    • NEW
    $119.00

    In Stock Available immediately!
  29. XAOC Devices Poczdam Leibniz Device Komutator
    XAOC Devices Poczdam Leibniz Device Komutator 10hp
    $259.00

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  30. Boredbrain Music Xcelon xp3
    Boredbrain Music Xcelon xp3 3-Channel Stereo Mix Expander 22hp
    $429.00

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  31. Boredbrain Music DB25 Expander for Xcelon
    Boredbrain Music DB25 Expander for Xcelon 8hp
    $399.00

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  32. XAOC Devices Deva 1970 Feedback Loop Commander
    XAOC Devices Deva 1970 Feedback Loop Commander 8hp
    $224.99

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  33. Ritual Electronics Crime II
    Ritual Electronics Crime II Expander for Miasma 4hp
    $125.00

    In Stock Available immediately!
  34. ALM Busy Circuits MT-EX2 Mega-Tang Expander
    ALM Busy Circuits MT-EX2 Mega-Tang Expander 4hp
    $139.99

    In Stock Available immediately!
  35. XAOC Devices Ostankino II Moskwa II Expander
    XAOC Devices Ostankino II Moskwa II Expander 8hp
    $209.00

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  36. Steady State Fate V-Mutes Vortices Expander
    Steady State Fate V-Mutes Vortices Expander 6hp
    $139.00

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  37. 4MS Wi-Fi Expander for MetaModule
    4MS Wi-Fi Expander for MetaModule 4hp
    $100.00

    In Stock Available immediately!
  38. ESX-8CV Mk2 Expansion
    Expert Sleepers ESX-8CV Mk2 Expansion 4hp
    $199.00

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  39. Blukać Endless Processor Expander Kit
    Blukać Endless Processor Expander Kit 4hp
    As low as $159.00
    Multiple Options Make a selection for stock info
  40. Boredbrain Music IO Expander for Xcelon
    Boredbrain Music IO Expander for Xcelon 8hp
    $119.00

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  41. Black Corporation ISE-NIN Breakout
    Black Corporation ISE-NIN Breakout Expander for ISE-NIN Voice 22hp
    $299.00

    In Stock Available immediately!
  42. ES-5 mk3 Expander for ES-3
    Expert Sleepers ES-5 mk3 Expander for ES-3 4hp
    $169.00

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  43. NONO Modular 2 Channel Expander For Major Tom
    NONO Modular 2 Channel Expander For Major Tom 14hp
    $329.00

    In Stock Available immediately!
  44. XAOC Devices HRAD Praga Expander
    XAOC Devices HRAD Praga Expander 10hp
    $324.99

    In Stock Available immediately!
  45. Neuzeit Instruments WarpEx Expander for Warp
    Neuzeit Instruments WarpEx Expander for Warp 4hp
    $129.00

    In Stock Available immediately!
  46. Intellijel Designs Tête Expander for Tetrapad
    Intellijel Designs Tête Expander for Tetrapad 8hp
    $299.00

    In Stock Available immediately!
  47. Manifold Research Centre Door To The Stars
    Manifold Research Centre Door To The Stars Tetragrid Expander 4hp
    $149.00

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  48. Der Mann mit der Maschine R2M / R2C
    Der Mann mit der Maschine R2M / R2C Droid Link System
    $149.00

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1-48 of 253 items

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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.