The Doepfer A-138A Eurorack Mixer Module is a four channel mixer that uses potentiometers with a linear response, making it suitable for control voltage mixing.

Each of the four inputs has its own attenuator, as well as there being a master attenuator. This allows it to be used at the end of an audio chain, meaning it can be used to interface directly with an external mixer, amplifier, etc.

The main features of the Doepfer A-138A Eurorack Mixer Module include:

• Four channel mixer
• Uses potentiometers with a linear response
• Width: 8HP/40.3mm
• Depth: 35mm (measured from the rear side of the front panel)
• Current: 10mA