I've recorded hundreds of cassettes over the years and mainly played them in cars. I always recorded with the Dolby on but when I played them back, the Dolby was off. You are not going to hear tape hiss in a car, but on home equipment, the Dolby really muffled the sound during playback. Adjusting the tones controls just didn't get it. It was better to leave the Dolby off and then use the tone controls to get the best sound. The pre-recorded cassettes were done using high-speed duplication, so sound quality was never as good as what you could do yourself at home with decent equipment. On top of that, the major manufacturers of pre-recorded tapes never used as good a tape quality as you could buy in blank tapes. On pre-recorded cassettes, the housings which the tapes were in were also not very good quality. It would be a major step up in quality if someone took the factory pre-recorded tape out of the cassette it came in and transfer it to, say, the cheapest TDK or Maxell cassette.