Building these DIY kits happens on your own risk. We can't do support or give a guarantee for correct function, because that depends on your own skills. Be responsible and check the building instructions before you buy. Thank you!


MRG Synth - Fold

The MRG FOLD is a 4-stage wave folder inspired by the Harmonics section of the Buchla 259.  It is not a clone, however, as it has four folding stages instead of five, and the internal op-amps of the wave folding section have been changed from the original to work at 5V instead of 6V. Furthermore, the input signal is internally attenuated to 1V instead of 7V.  All of this required a complete recalculation of all parameters of the wave folding circuit.

As the original, MRG FOLD has the possibility of mixing the input signal with the folded one (dry/wet). A unique feature of the MRG FOLD is that it allows to substitute in the mixing the input signal with an external one. On top of this, the FOLD has an overdrive stage, right after the wet/dry mixing, that contributes to the personality of the module.

Check out this video on youtube!

Power: 20mA @ +12V; 20mA @ -12V; 0mA @ 5V

Width: 4 HP
Depth: 40mm


This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.
DIY level: Easy/Medium.

MRG Synth - Fold

75,00 €

  • 0,07 kg
  • Sold out at the moment

MRG Synth - Kick

The MRG KICK is a clone of the TR-808 Bass Drum. The major difference with the original circuit, apart from some adjustment for working at Eurorack levels and voltage, is on the trigger and envelope trigger mechanism.

The MRG KICK has two trigger inputs (TRIGGER1 and TRIGGER2). Each of them has a different accent level, and can be used independently to generate kicks at different accents that can be changed dynamically. This trigger works eiter with gate signals (e.g. square LFOs) or proper trigger (impulses) signals.

As the original, MRG KICK has control for TONE and DECAY. The DECAY in particular can be stretched to a longer decay than the original.

Technically, this is not a simple module. Based on a four layers PCB, it uses a rail-to-rail op-amp, capable of full 24VPP output signal. This makes the MRG KICK a loud, powerful 808-like BD, perfect for saturation and distortion.

Check out this video on youtube!

Power: ?mA @ +12V; ?mA @ -12V; ?mA @ 5V

Width: 4 HP
Depth: 40mm


This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.
DIY level: Easy/Medium.

MRG Synth - Kick

75,00 €

  • 0,07 kg
  • Sold out at the moment

MRG Synth - Multi

4HP Passive Multiple for Eurorack Modular Synthesizers. This is a simple module that allows to duplicate signals. Each column can be used either as a dual 1x3 multiple, or as a 1x5 multiplier, depending on the presence of a jack in slots 3 and 4. Really simple, but incredibly useful. Front panel in matte black PCB. Lead-free components, solder and PCBs.

Power: Zero, it's a passive module.

Width: 4 HP
Depth: 20mm


This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only through-hole parts to solder.
Building instructions can be found here. In case you need help or more information, feel free to contact the manufacturer.
DIY level: Easy.

MRG Synth - Multi

35,00 €

  • 0,04 kg
  • Available
  • Ships within 3-5 days1

MRG Synth - ATT

A Triple Passive Attenuator Module for Eurorack Modular Synthesizers. This is a simple module that allows to attenuate three signals independently. A simple but very useful module that is always handy to have in a rack. Front panel is in matte black PCB. Lead-free components, solder and PCBs.

Power: Zero, it's a passive module.

Width: 4 HP
Depth: 20mm


This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only through-hole parts to solder.
Building instructions can be found here. In case you need help or more information, feel free to contact the manufacturer.
DIY level: Easy.

MRG Synth - ATT

45,00 €

  • 0,05 kg
  • Available
  • Ships within 3-5 days1

MRG Synth - LPF

The MRG LPF is a 24dB low pass voltage controlled filter based on the AS3320 (clone of the CEM3320).  It is a classic, clean sounding module and the CV controls for resonance and cutoff are very responsive. Resonance can be set manually almost to the point of self-oscillation, and further CV input can make this module a scratchy self-oscillating one.

Check out this video on youtube!

Power: 21mA @ +12V; 18mA @ -12V; 0mA @ 5V

Width: 4 HP
Depth: 40mm

This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.

DIY level: Easy/Medium.

MRG Synth - LPF

75,00 €

  • 0,08 kg
  • Available
  • Ships within 3-5 days1

MRG Synth - LPF/a

The MRG LPF variant A is a 18dB + 6db low pass voltage controlled filter based on the AS3320 (clone of the CEM3320). The main characteristic of the filter is that one of the four poles is pushed farther away from the origin in the complex plane, creating a slope of 18dB at cutoff with no resonance, and a gentler response towards peak when the resonance is added. This dramatically changes the tone of the filter, and it creates an unique, acid but bass rich filter that still maintains that sound clarity that the AS3320 provides with exceptional reliability. In order to shake things a little bit more, a gain control is added, that reaches saturation pretty soon, but can also be lowered to further increase the range of this filter.

Check out this video on youtube!

Power: 25mA @ +12V; 20mA @ -12V; 0mA @ 5V

Width: 4 HP
Depth: 40mm



This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.

DIY level: Easy/Medium.

MRG Synth - LPF/a

75,00 €

  • 0,08 kg
  • Sold out at the moment

MRG Synth - VCA

The MRG VCA is a dual linear VCA module, based on the AS3360 (clone of the CEM3360). It's an extremely flexible module and can be used in a variety of ways. Both VCAs can be controlled by a CV entry, modulated by control knob. VCA1 also has an initial gain control (B1), that offsets the CV input by a constant value. This allows VCA1 to be left always open, with the initial gain controlling the amplification. If both input jacks are used (IN1, IN2), the two VCAs will operate independently. The output of VCA1 will go to OUT1, the output of VCA2 will go to OUT2. If there's no jack in IN2, the two VCAs will be cascaded, and the output of VCA1 will go both to OUT1 and as an input to VCA2. This allows this module to be used to process both the MIDI Velocity and the envelope of an audio signal.

Power: 50mA @ +12V; 20mA @ -12V; 0mA @ 5V

Width: 4 HP
Depth: 40mm

This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.

DIY level: Easy/Medium.

MRG Synth - VCA

70,00 €

  • 0,08 kg
  • Sold out at the moment

MRG Synth - VCO

The MRG VCO is an oscillator based on the AS3340 (clone of the CEM3340). Quality components, polypropylene timing capacitor, and precise tuning make this a small, simple, but high quality oscillator.

1V/Oct CV stable over more than 6 octaves, precise waves, PWM and SYNC input. Output waves are square and sawtooth. When no PWM input is present, the square wave has a duty cycle of 50% - this is actually configurable by an internal trimmer.

Square Out +5V / -5V
Saw Out +5V / -5V
Frequency range    16Hz-24kHz

Power: 11mA @ +12V; 13mA @ -12V; 0mA @ 5V

Width: 4 HP
Depth: 40mm

This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Building instructions can be found here. All SMD parts are pre-soldered, only trough-hole parts to solder. In case you need help or more information, feel free to contact the manufacturer.

DIY level: Easy/Medium.

MRG Synth - VCO

82,00 €

  • 0,08 kg
  • Sold out at the moment