Hi,
I just bought a "professional" CD & cassette recorder(Not cheap) from a company that has a Consumer, as well as professional line of recording stuff. I have hundreds of Cassette tapes, some of which I'll copy to CD.
I recorded from the Machine's CD side to It's Cassette side, some solo Oscar Peterson piano stuff, and on playback there was, to me an unacceptable amount of wow and flutter, that I don't get when played on an older JVC inexpensive cassette deck.
The Oddity is that when I listened to that same tape thru the headphone jack with My Sennheiser HD590's,
the wow & flutter problem seems nowhere as noticeable. Very, very Strange!!
I don't know if there are some frequencies that don't show up in headphone or coloration of some sort, as opposed to coming thru Amp and speakers?
Bill