Dull sound using home recorded type II tapes with type II setting in WM EX512

Hi All,

I noticed that my home recorded tapes, recorded from LP using a Kenwood KX7030 deck on older TDK SA90 tapes sound dull on my walkman. But when I tape over the hole for tape type detection so that it plays with type I settings, the sound is noticeably better. The cassette deck I used for recording has autobias settings, and not really a way to manually change it. What can I do to make sure that the recordings sound properly with the type II settings. Or should I just tape over all the holes and live with it? I'm wondering if my recordigs can sound better with a different setting or way of recording. I have not adjusted anything on the tape deck, the walkman has fixed azimuth and I also did no demag of the heads. Should this improve it? The recording sounds great on the cassette deck, just not on the walkman.

Job