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Doepfer A-138M Matrix Mixer
Eurorack Mixer Module

MPN: A-138M
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When you've got a few sources to route to a few destinations - either audio or CV - the Doepfer A-138m matrix mixer is just the ticket...

  • Mixer module for Eurorack
  • 4x4 matrix mixer
  • 4 inputs
  • 4 outputs
  • Outputs are selectable between unipolar and biopolar
  • Width: 20HP
  • Current draw: 20 mA

The Doepfer A-138m is a 4 x 4 matrix mixer with switches for unipolar/bipolar mode for each column.

Unipolar means that the controls work as attenuators. Bipolar means that the controls work as polarizers. In this mode the amplification is zero in the middle position of the corresponding control.

Turning the knob counterclockwise from the center position the signal is subtracted from the output sum with increasing amount (i.e. negative). Turning the knob clockwise from the center position the signal is added to the output sum with increasing amount.

The module is DC-coupled and can be used for both audio and control voltage mixing.

By means of an internal jumper one can select if the four upper controls work as DC offset generators - provided that no patch cord is plugged into the upper input socket. If this feature is not required it can be deactivated by removing the jumper on top left of the pc board.

View product on the Doepfer website.

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£132.00 inc VAT

Available to order (more info)
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  • 14-day money-back guarantee
  • For all items ordered online or over the phone, we offer the statutory 14 day “cooling off period”. This means that if you are unhappy with the goods for whatever reason, you can return them for a full refund within this period.

    Please note, however, that certain items are exempt from this – see our Terms and Conditions for more info.

  • Extended seasonal exchange
  • Items bought 1st November 2017 to 24th December 2017 are eligible for our Extended Christmas Exchange and can be exchanged until Wednesday 31st January 2018.

  • 1 year warranty
  • This product comes with a 1 year warranty as standard.

    Please note that you will need to register your product with the manufacturer to qualify for any warranty beyond 12 months.

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