The QUAD REVERSIBLE ATTENUATOR module features four active bipolar attenuators for audio signals and control voltages.
„0“-position = no output signal present
“+10” position = output signal equals input signal (unity gain)
“-10” Position = output signal equals input signal (unity gain), but inverted
The four input jacks are “chained“, input 1 is internally connected to +10 volts if nothing ist patched.
So the module doubles as single to quad variable voltage source.