Doepfer - A-135-3

A-135-3 is a  is a voltage controlled stereo mixer with four inputs. Behind a front panel with 8 HP only eight linear VCAs (voltage controlled amplifiers) and the mixer based on the VCAs are available. Controls, Inputs and Functions of each input: Level (manual control of the VCA amplification), small rubberized knob (L1...L4) Control voltage input with associated attenuator (CV 1...4), for the full VCA control range about 0...+5V control voltage are required (attenuator fully clockwise), for higher control voltages the attenuator is used, the attenuators are without knobs, just plastic shafts with white marker Signal Input left/right (InL 1...4 / InR 1...4)  The signal inputs are not equipped with an attenuator. But the VCAs can process all signals up to 15Vpp / -7.5...+7.5V without clipping. In case of higher levels an external attenuator is required (e.g. A-183-1). The sum of the left and right signals appear at the sockets Out L and Out R. The maximal amplification is  about 0.5