Manufacturer Description:

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

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)
Application example for Aux Send only: pre-listening in combination with the headphone amplifier module A-139-2

Width:4TE / 4HP / 20.0 mm
Depth: 40 mm (measured from the rear side of the front panel)
Current: + 20 mA (+12V) / - 20 mA (-12V)