I have a new Sony 3 head ES series cassette deck,why do tdk blanks sound so much worse on this deck than maxell tapes.I'm comparing TDK SA-X to Maxell XLII-S.I also noticed that the maxell's rewind and fast forward much quicker than the TDK'S.The deck sounds like it's straining a little when it rewinds the tdk's,i've noticed this on my car deck also with tdk's.I always thought that tdk was supposed to make better tapes than maxell.This sony deck has a tape calibration system so that you can optimize the deck to any tape so i dont understand why the tdk's dont sound good.Has tdk's quality gotten worse over the years?And why does my deck sound like it's straining a bit with the tdk's?Are the tdk tapes shells put together to tight?I've tried the rewind thing on other decks and have noticed that the maxell's rewind quicker than the tdk's on other deks i've tried also.Thanks and Much PEACE!!