The Aiwa ad f990 was a pretty close match sonically to the fabled nakamichi Dragon. Sold my 990 on ebay, and kept both my 770 and 660 though. Reason being Is the 990 still fetched top dollar. I have had some issues buying sealed pre recorded tapes, I’d say 1 out of every 10 were junk and would not play properly. Maxell and tdk I’ve found to be the two best tapes available. To buy these tapes still sealed, you pay a pretty penny for them. I would not say that the tapes played thru the aiwa or even a Nak are true hifi but there is something truly unique about the sound, warm and inviting, not sure how else to describe it. I love it.