Synthrotek is proud to offer a line of 1U Eurorack powered modules for your modular synthesizer system. 20 and 24HP sized modules means that you can completely fill a 84 or 104 HP row with no extra modules or blank panels needed.  Synthrotek’s waterproof cases come with a 1U row designed for utility, performance and beyond! Available as a complete factory assembled module, a kit and PCB/Panel combo.

Synthrotek 1U Stereo Output Mixer

Synthrotek 1U Stereo Output Mixer

The 1U Stereo Mixer is intended for pannable stereo output, but it is also suitable for both DC (Gates, Triggers and Control Voltage) & AC (audio) signals.


– 2 channels, 2 inputs per channel

– Jumper select ~unity gain or gain ~x2 (6db boost) amplification

– Mixes both AC signals (audio) and DC signals (gates, triggers, CV)

– Stereo output with panning per channel

– Attenuator and amplifier per channel

– 1/4” and 3.5mm (1/8”) output jacks


Current draw: +12: 13mA, -12: 9.2mA

Depth: 32mm

Width: 24HP


  1. Michael B says:

    Hi, sorry if this is a completely clueless question, but is it possible to listen via headphones in the lineouts?


  2. Steve Harmon says:

    Hey Michael,

    Headphones work great with our stereo mixers!


  3. mick hedley says:

    Could the stereo outputs be connected to a line level input of an audio interface like a MOTU? (without using the mic input)

  4. Steve Harmon says:

    The stereo output mixer will allow you to connect your modular to line level equipment, so yes, this will let you do that.


  5. Ben says:

    are inputs mono or stereo?

  6. Steve Harmon says:

    Hey Ben,
    The inputs are mono and let you mix to two stereo outs.
    Here’s a link to the BOM also found above:
    Happy building!

  7. David says:

    Hi! Two questions. One, am I correct in thinking that the 1/8 inch out can be rerouted to another eurorack module? Two, can it send CV to a device that has 1/4 inch CV in? I think the answer is yes in both cases, but i wanted to check before i routed anything. Thanks!

  8. Steve Harmon says:

    Hey David!
    You can definitely use it for both those applications, just keep in mind that you’ll need to pan the channels to the left if you’re using stereo cables 🙂

  9. Pedro says:

    the 1/8 output – is it modular level or line level? If it’s modular level then I can’t connect headphones, etc. If it’s line level, then I can’t re-route it to other modules.
    Can you clarify how it works please? thanks

    I presume 1/4 output is line level, right?

  10. Steve Harmon says:

    Hi Pedro, both outputs are line level. You can plug in headphones to the 3.5mm jack.

  11. Daniel says:

    Is it Intellijel compatible?

  12. Synthrotek says:

    Hi Daniel, it is not, it follows the PulpLogic standard.

  13. John Schussler says:

    Sure wish you’d mentioned the Pulp Logic thing up top somewhere prominent. Just finished building this and tried to stick it in my Intellijel case. No bueno.

  14. Synthrotek says:

    Hi John, sorry for the hassle. I will try to bring it up top and in red.

  15. John Schussler says:

    Thanks. Any plans for Intellijel format version?

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