> the A-183-3 amplifier looks like a useful utility module Dieter. I'm
> often wishing I had something simple like that onboard - In practise
> whether x4 is really enough for audio I'm not sure... maybe
>
> Richard

Within the A-100 or connected to other modular systems x4 should be
sufficient because the output signal has to be within about -10.5V....+10.5V
because of the +/-12V power supply (you cannot obtain an output voltage that
is higher than the supply voltage and in adddition there is some voltage
drop in the operational amplifiers). This means that any voltage in the
range -2.5...+2.5V can be amplified before clipping occurs. If you want a
higher amplification the module can be modified (changing the value of a
resistor for the ranges x2 and x4).

Best wishes
Dieter Doepfer