I have scored a lovely Denon DR-M24HX cassette deck. However, with a rated line level output of 775mV it is noticeably lacking in output through my Topping TP60 compared to my other sources. When I connect the headphone output jack (max volume) to the line in I get a much better signal with no noticeable drop in SQ.
I wonder if there is some electronic "wear and tear" in the line out circuit. My options are to find some sort of device to add some gain to the line level out or continue to use headphone out IF I am not damaging my amp.
Any thoughts???