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Your new analog audio console!


The Mixerblocks series is an original concept for a modular and expandable audio mixing console. A variable number of channel strips can be connected like building blocks between themselves and to a main I/O “docking” block. Each channel “block” can have one or more “extra blocks” connected to it, adding supplementary effect sends/returns or submix groups to the configuration.

The currently available blocks are:


With Mixerblocks, you can keep adding channels to your console, each time you add a new instrument to your setup.
In a similar way, you can add new FX send/return buses to use more effects. You can also add submix buses to help grouping your instruments. Some more devices (recorder/looper, vuMeter indicator, etc.) are being designed and coming soon.


More than just adding up the sounds from each channel, Mixerblocks allows routing the channel signals to effects and/or (more interestingly) any submix buses, which in turn can be flexibly routed to the master outputs (left, right or both), processed through insert effects or connected to other devices through the individual outputs. And again, more blocks (devices) are being designed, which will further enhance Mixerblocks’ routing possibilities.


The Mixerblocks concept includes the possibility to design different kinds of channels with varying features and sonic behaviours (different types of preamps or EQs) so that the mixing console can truly adapt to any particular need by including a combination of channel types.
This is also an open-hardware licensed product so that anyone who wants to (private or company), can design a compatible channel block or extra module block.



Channel block

  • Current draw: max 120 mA
  • Input impedance:
    11 kΩ unbalanced
    22 kΩ balanced
  • SNR: -93 dB
  • Crosstalk (at 1 kHz):
    channel mute: -70 dB
    channel down: – 70 dB
  • Pad: 0 dB/-20 dB
  • Input amp gain: -60 dB … 10 dB
  • Fx send gains: -65 dB … 0 dB
  • EQ:
    gain high: ±10.5 dB @ 60Hz
    gain mid: ±10.5 dB @ 300 Hz – 1.9k Hz
    gain low: ±10.5 dB @ 12 kHz
  • LoCut frequency: 70 Hz
  • Fader amp gain: -60 dB … +10 dB
  • Frequency response:
    Input to main: 20-20 kHz, +0/-0.5 dB
    Input to submix: 20-20 kHz, +0/-0.5 dB
    Input to effect sends: 20-20 kHz, +0/-0.5 dB
  • Dimensions (WxHxD): 53 mm x 63 mm x 400 mm
  • Weight: 450 g 

Docking block

  • Current draw: max 0.35 A
  • SNR: -93 dB
  • Input impedance:
    FX return: 32k Ω unbalanced, 64 kΩ balanced
  • Output impedance:
    Main mix putput: 70 Ω unbalanced, 140 Ω balanced,
    Submix output: 70 Ω unbalanced, 140 Ω balanced,
    Effect send outputs: 70 Ω unbalanced, 140 Ω balanced,
    Phones output: 30 Ω
  • Crosstalk (at 1kHz):
    Master down: -70 dB
  • Frequency response:
    Input to main: 20-20 kHz, +0/-0.5 dB
    Input to submix: 20-20 kHz, +0/-0.5 dB
    Input to effect sends: 20-20 kHz, +0/-0.5 dB
  • Master fader amp gain: -60 dB … +10 dB
  • Submix fader amp gain: -60 dB … +10 dB
  • Phones amp gain: -60 dB … +10 dB
  • FX return amps gain: -60 dB..+10 dB
  • LED vuMeter: 3dB/LED pair
  • Dimensions (WxHxD): 145 mm x 63 mm x 400 mm
  • Weight: 970g

Power supply

  • Supply: 2.5 or 3.8 A
  • Voltage input: 110 V/ 220 V
  • Voltage output:
    +15 V
    -15 V
    +48 V
  • Max current draw: 2500 mA



The Kit


The blocks (channel, dock, extra effect channel, extra busses channel, etc.), come in a DIY kit containing:

  • a PCB with the SMD components (resistors, capacitors, op-amps and diodes) already soldered
  • the true-hole components (knobs, sliders, LEDs, buttons, etc.) that need to be soldered
  • Mechanical components and
  • An optional enclosure (MDF of metal)

Most of the components are already mounted and this ultimately is a very quick and easy build, nevertheless careful mounting is necessary for a good fit with the enclosures and between the blocks. The assembly instructions can be found here.

This way to the assembly instructions
Contact us to get your own



The enclosures available for the Mixerblocks kits are MDF or sheet metal (coming soon).

The MDF version gives a beautiful laser cut slick-looking console, whereas the metal enclosure builds up to a more classic console, suitable if you need to safely travel with it or if you want better shielding.

Mounting the MDF enclosure is very easy, and very soon you’ll find instructions in the Documentation section. Also, if you want to adapt the design or just cut the enclosure yourself, that’s also where you’ll find the CNC-ready designs.

DIYRE compatibility


The Basic channel block is compatible with the Colour format series circuit blocks from DIYRE. These are various small modules with a standardized footprint and connectivity that replicate certain classic analogue circuits’ sonic “color”. By using them, one can slightly modify (colour) a channel’s sound. A switch is used to bypass the module and an RGB LED indicates the “type” of Colour circuit that’s connected.

Open Hardware


In order to encourage DIYers everywhere to build their own consoles, other companies (or individual makers) to design new channel block types or extra blocks, as well as to be transparent,  all the technical design documents are published under the cc-by-sa-4.0 license.

If you want to know more than what’s shown in the signal path drawing, check out the links in the documentation section and study the schematics, PCB files and mechanical drawings on Github.

Take it to the community


You encountered a problem or you’re not sure about something while building one of the kits? You want to share an experience you had building or using a Mixerblocks console? You have an idea for a new type of block or for improving on an existing one? You want some information or advice before deciding what to buy?
Or maybe you just want to [understandably;)] show off your newly built Mixerblocks ?

Come to our forum, you’ll find a place there for all these and more.
We want to build a community of Mixerblocks users who exchange experiences and ideas to help each other and to help us evolve the Mixerblocks concept.

This way for the Forum


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