u/AndyOf77

A pal recently changed his amp and gave me his old technics cassette player and CD player to add onto my system, I've been having a whale of a time listening to tapes again and recording stuff etc, this got me thinking about a technical question though, say if I was only ever going to record from one source, could I theoretically just connect said source, be that my Bluetooth or DAB tuner say, directly into the recording inputs on the tape deck? Guessing it would work due to being able to set recording levels on the cassette deck?