Doepfer A-138o Performance Mixer Output

The Doepfer A-138o Performance Mixer Output is the output section of the most cost-effective performance mixer for eurorack.

Doepfer A-138o Performance Mixer Output

Modules A-138p/o are used to built a simple performance mixer (instead of an external stand-alone mixer). Module A-138p is the 4-fold input module, A-138o is the output module that can be combined with one or more A-138p.

A-138p features:

• 4 channels
• controls and inputs for each channel
• input (3.5 mm mono socket)
• signal LED (as a coarse monitor of the incoming level, the level is measured after the gain control)
• mute switch
• gain (control to adapt different audio levels)
• Level (the main volume control)
• Aux
• Pan
• internal jumper for each channel to choose between Aux pre/post main Level control
• internal connection to the output module and to other A-138p modules
• A-138p requires A-138o (no stand-alone use)

A-138o features:

• level controls for Left, Right and Aux
• output sockets for Left, Right and Aux (3.5 mm mono sockets)
• A-138o requires at least one A-138p (no stand-alone use)

Application example for Aux Send and Aux Return: looping in another module for effects (e.g. DSP module A-187-1, BBD module A-188-1, Spring Reverb A-199) Anwendungsbeispiel für Aux Send only: pre-listening mi combination with the headphone amplifier module A-139-2

A voltage controlled version of a performance mixer is also in the planning state. But this is a totally different project and noticeable more expensive because 4 high end VCAs are required for each input channel (i.e. 16 VCAs for the voltage controlled version of the A-138p). In addition 16 CV inputs with attenuators and LED displays for all functions are required.