The A-138p and A-138o modules are a simple performance mixer designed to at least partially replace existing external mixers by providing the most important functions in modular form. A-138p is the 4-fold input module, A-138o the output module. One or more A-138p can be combined with an A-138o.

A-138p Features:

4 channels
Controls, displays and inputs per channel:
Input (3.5mm mono jack)
Signal LED (as a rough indication of the input level, the measurement is made according to the gain control)
Mute switch
Gain control (to adjust different levels of different signals)
Level control (the actual volume control for the input, linear characteristic)
Panorama control (distribution of the signal on the left and right outputs of the A-138o)
Aux control (auxiliary path, for example for pre-listening to a signal or as an effect way usable)
Internal jumper to set whether the aux control picks up the signal before or after the level control (pre / post).
Internal 5-pin connection to connect the module to the A-138o and, if needed, to another A-138p