Depends. Should be OK with Dolby 5 channel if placed on the input but probably not with digital systems. But I don't understand what you mean by hooking up to both input AND output?
Tape (audio) in, is input. Tape (audio) out, is output to record what the receiver is playing. This won't work, to connect an equalizer. Receivers have a zero out and in and are jumpered until adding what you want to add, that's where equalizer or amp, pre-amp goes
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Depends. Should be OK with Dolby 5 channel if placed on the input but probably not with digital systems. But I don't understand what you mean by hooking up to both input AND output?
Tape (audio) in, is input.
Tape (audio) out, is output to record what the receiver is playing.
This won't work, to connect an equalizer.
Receivers have a zero out and in and are jumpered until adding what you want to add, that's where equalizer or amp, pre-amp goes