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Doepfer A-138A Linear Mixer
CV Signal Mixer MPN: A-138A

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Got sounds coming from a few places? Get them mixed with the Doepfer A-138a Linear Eurorack mixer

  • Eurorack mixer module
  • Linear potentiometers make this unit ideal for control voltage mixing
  • Four inputs
  • Width: 8HP
  • Current draw: 10 mA

The Doepfer A-138a is a four channel mixer, which can be used with either control voltages or audio signals.

Each of the four inputs has an attenuator, and there's a master attenuator, so that the mixer can be used at the end of the audio chain - ie. it can be used to interface directly with an external mixer, amplifier, etc.

The Doepfer A-138a features potentiometers with a linear response, so is especially suitable for CV signal mixing.

View product on the Doepfer website.

Please note that these videos are dynamically generated by means of a Youtube search for the phrase "Doepfer A-138A Linear Mixer" to save you time searching Youtube yourself. As such, the views expressed may not be those of Red Dog Music Limited, any product features or specifications quoted should be confirmed with Red Dog Music staff prior to ordering, and the content may not always be relevant to the product shown on this page.

  • £59.00

    Sum your signals ready for further processing or getting out of your modular with the Dreadbox White Line Mixer

    • Mixer module for Eurorack systems
    • 3 individual, 3 to 1 mixers
    • Suitable for Audio and CV signals
    • Width: 6 HP
    • Current draw: 10mA (at +12V) / 10mA (at -12V)
  • £95.00

    A flexible matrix mixer with a dedicated headphone output, check out the Rebel Technology Mix 01

    • Matrix mixer for Eurorack modular systems
    • 4 inputs and 2 outputs
    • Dedicated headphone output
    • On the back of the module there are four interconnect headers. Two 5-pin headers connect the input channels and normalled inputs. Two 3-pin headers connect the summing bus and normalled outputs
    • Normalling means that a connection can be made between two modules when nothing is inserted into the normalled jack. Inserting a plug into the jack breaks the normalled connection
    • Connecting the input bus of two Mix 01 modules creates a 4 in / 4 out matrix. Connecting the output bus creates an 8 in / 2 out matrix. Both the input and output bus can be connected simultaneously to create many routing possibilities: 4/4, 8/2 or any combination of inputs and outputs allowed by the normalling function of the jacks. The modules can still be used independently while connected to the same input and output bus
    • Width: 10HP
    • Current draw: +12v: < 30mA; -12v: < 30mA
  • £132.00

    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
  • £144.00

    The Make Noise ModDemix is a super fast VCA, ring modulator and summing mixer and more in a very small package

    • Unique balanced modulator circuit turns OFF around zero volts at the Carrier/ Control INput, making the circuit behave well as a VCA
    • STRENGTH is a Combo Knob, with nothing patched to STRENGTH CV IN, it works as a standard panel control, setting Level. With signal patched to STRENGTH CV IN, it works as an attenuator, setting the strength of the modulation
    • Both circuits feed a summing stage, allowing the module to be used as a voltage controlled mixer
    • AUXiliary IN allows for the stacking of multiple modDemix and/ or Optomix to create larger mixes
    • Able to introduce warm distortions to audio signals, sounds like no other VCA or Ring Mod
    • MAX BLINKENLIGHTS, 8 LEDs packed into a small 6hp module
    • Width: 6hp
    • Max Depth: 24mm
  • £154.00

    The Studio Electronics Boomstar AMP is not only a quality VCA but also offers a drone circuit and switchable drive

    • Eurorack-format analog amplifier module for your synth rig
    • Two-stage Class A discrete circuitry with hand-matched transistors offers superior tone
    • Four CV inputs provide envelope, modulation, and volume control
    • Switchable Drone mode holds the last played note for continuous trails
    • Drive control lets you kick in an extra helping of transistor texture
  • £164.00

    Put four VCAs in your modular synth the Mutable way with the Mutable Instruments Veils Quad VCA module

    • Quad VCA module for Eurorack modular systems
    • VCAs have an adjustable response curve
    • Outputs are daisy-chained, allowing adjacent channels to be mixed
    • All inputs DC-coupled
    • All inputs handle audio-rate signals
    • Gain scale: a +5V CV translates to a gain of 1 (0dB)
    • Gain range: 2 (+6dB) in linear operation, 10 (+20dB) in exponential operation
    • Width: 12 HP
    • Current draw: +12V: 50mA ; -12V: 50mA.

£57.00 inc VAT

Available to order (more info)
  • 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.

  • 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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