Processor Loop

Can a processor loop on a preamp be used as alternative connection for a cassette deck?
yes. In the old days before processors, they called it a tape loop.
The processor input does not provide any gain, however, so your cassette deck will need enough output voltage to power your amp.
Man...are we getting old, or what.
If its a loop and not just a processor input then I THINK it will control volume.
Thank you all very much!
A processor input on a lot of pre-amps just passes the signal directly from the input jacks to the pre-amp's outputs. ARC's in particular are wired that way. That arrangement is the very rational for the input! But Swampwalker is right---the inclusion of the word "loop" implies the input is NOT a straight pass-through one.