Tape-out jacks are very useful for those who sometimes want to record LP to digital. And analog tape is enjoying a bit of a resurgence - especially reel-to-reel - so I'm not sure why you doubt that those jacks are being used.
Tape-in and Tape-out ports
Why do so many preamp manufacturers still provide Tape-in and Tape-out ports? I doubt if they expect folks use them for hooking up a tape player. Some even still have a tape monitor switch on the front panel. How do you guys use these ports and has anyone noticed a difference in sound quality if the tape-in port is used for something else like a CD player, etc.? If the tape-out port is just like another output, e.g., drive a separate amp or a powered subwoofer, etc., why not just call it Output?
Been meaning to ask this question, albeit it might sound rudimentary.
Been meaning to ask this question, albeit it might sound rudimentary.