Module A-138j is a four channel mixer with an additional polarity/mute switch for each input. In the upper position of the corresponding switch the inverted signal is used. In the center position the input in question is turned off (mute) and in the lower position the "normal" (i.e. non-inverted) si..
Performance Mixer Output ModuleA-138o is the output module that can be combined with one or more A-138p.level controls for Left, Right and Auxoutput sockets for Left, Right and Aux (3.5 mm mono sockets)A-138o requires at least ine A-138p (no stand-alone use)http://www.doepfer.de/A138p.htm20 mA +12V2..