Good cassette player?

I remember much better treble extension in AIWA deck equipped with HX-Pro (bias servo), but it was only for recording.

some nice refurbished Nakamichi sometimes available at decent prices....you might want to make sure the tapes are still good before you spend money...sometimes they decay badly, physically and sonically...

Save your money. Most likely these cassettes are not usable anymore. I hate to be the bearer of bad news, sorry. 

Dear @clustrocasual  : This one is a VERTY FINE DESIGN AND YOU CAN FIND OUT SECOND HAND PROBABLY THROUGH EBAY, page 58:

https://worldradiohistory.com/Archive-All-Audio/Archive-Audio/80s/Audio-1984-09.pdf

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

As long as the tapes were good quality, TDK, Maxell, etc. they should play fine. If they were cheap Radio Shack or other cheap ones, all bets are off. I was always a Nak fan, and would agree that getting a used Nak would be a good idea, (since you can be sure they have been well taken care of). But you should digitalize them as soon as possible by recording direct to a PC. Lots of adapters on Amazon and other sites you can buy.