XAOC Devices
Karl Marx Stadt 2013 Panel w/ Doepfer DIY Synth - 42HP

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Item: N13-2876

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Karl Marx Stadt 2013 Panel w/ Doepfer DIY Synth - 42HP
Karl Marx Stadt 2013 Panel w/ Doepfer DIY Synth - 42HP Karl Marx Stadt 2013 Panel w/ Doepfer DIY Synth - 42HP



The XAOC Devices ‘Karl Marx Stadt’ is a front-end Eurorack Module conversion solution for the Doepfer DIY Synth Board, a great DIY synthesizer offering that can be a headache for DIY beginners. XAOC Devices now offers a convenient Eurorack conversion modules that gets users started in seconds by simply mounting the board onto a set of headers, absolutely NO soldering or wiring necessary! The Karl Marx Stadt + DIY Synth combo is the most economically effective and rewarding entry solution for modular beginners!

The Karl Marx Stadt panel has been laid out in the most obvious monosynth style and manner. XAOC Devices has taken advantage of all the internal patch-points provided by Doepfer. Also, there are normalled connections made behind the panel so users can use the module as a self-contained Analog Synth Voice without even plugging any patch cables in. Of course, the real fun starts when users break them by simply patching anything into their respective input jacks.

All the essential functional blocks are provided so users can learn the subtractive synthesis basics but it is also a great addition to more advanced systems as well. The synth consists of 7 modules: VCO, LFO, VCF, VCA, ADSR, slew limiter and inverter. All of these can be used independently. For further information, please refer to DIY Synth’s owner manual. XAOC Devices made some minor mods to the application suggested by Doepfer. Fixed VCF outputs are now mixed in different configurations and the VCA offset can be adjusted by the trimpot on the back. By design, the VCF resonance is provided by feeding the output back in. XAOC Devices found it fun to actually open up the feedback loop for routing the signal outside (any output) and back. Now, users can obtain some interesting results with external treatment through effects, filters, etc. 


  • Doepfer DIY Synth Board Eurorack Module Conversion Solution
  • Extremely easy and straightforward assembly, no DIY skills necessary at all
  • Self-Contained Analog Monosynth Voice
  • Seven Essential Submodules that can be used independently (VCO, LFO, VCF, VCA, ADSR, Slew Limiter, and Inverter)
  • VCO Controls: Course Frequency, Fine Tune, FM EXP/LFO TRI, FM LIN, Pulse Width, PW MOD 1/LFO TRI, SLEW/1V-OCT
  • VCO Patch-Points: 1V-OCT Input, Sync Input, FM EXP Input, FM LIN Input, SLEW Input, PW MOD Input
  • VCO Outputs: Pulse Output, Saw Output, SLEW Output
  • VCF Controls: Cutoff Frequency, Resonance, CV 1 ADSR, CV 2 LFO TRI, Audio 1 VCO SAW, Audio 2 VCO PULSE, L-N-H Mix
  • VCF Patch-Points: Audio Input 1, Audio Input 2, CV 1 Input, CV 2 Input, RES FDBCK Input
  • VCF Outputs: LP OUT, BP OUT, HP OUT, L-N-H OUT
  • LFO Modes: LO, HI, STD
  • LFO Speed Slider Potentiometer
  • VCA Controls: Audio 1 VCF LP, Audio 2 VCF BP, Audio 3 VCP HP, CV 1 ADSR, CV 2 GAIN
  • VCA Patch-Points: Audio Input 1, Audio Input 2, Audio Input 3, CV 1 Input, CV 2 Input
  • VCA Output
  • Envelope Speed Modes: LO, HI, STD
  • ADSR Envelope Control Slider Potentiometers for A-D-S-R
  • ADSR Patch-Points: INV IN, GATE IN
  • Normaled Breakable Connections (MS-20 Style)
  • 30 Patch-Points

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  • Eurorack Module (Conversion Kit)
  • 42 HP Width
  • 40mm Depth
  • Current Draw: 150mA @ +12V, 20mA @ -20V

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