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Doepfer Musikelektonik logo

Analogue  Modular  System  A-100

Width

HP

Depth

mm

Current

mA

Lighning Flash

Owners Manual

Exponential Mixer  (for Audio)

The A-138b is a four input mixer which is intended to be used with audio signals. Each of the four inputs has an attenuator, and there is also a master attenuator on the output stage for additional control.

The A-138b has exponential (logarithmic) controls and is most suited for audio signals (the A-138a has linear controls for control voltages).

The A-138b has a DC coupled input stage, so that it will add static DC levels as well. Input 1 control works as a DC offset generator (about 0...+5V) provided that no patch lead is plugged into socket In1.

If this feature is not required it can be deactivated by removing a jumper on the pc board





A-138b

8

35

10HP

10

10HP

A-138b  

Doepfer A-138b