stager
The best cassette decks like the Nakamichi Dragon or any of several other high performance Naks (I have a 682ZX) or Tandberg or 3 head Tascams, using Dolby B, are capable of recording a signal with wider frequency bandwidth and less noise than mastering machines like the Scully and Ampex decks which were used for some of the most treasured recordings ever made.That's simply not possible. The wider tape width and higher speed of reel-to-reel give it an inherent advantage over cassette. There's really no comparison. For example, that's why tape deck manufacturers used -20dB levels when they quoted frequency response for cassette decks. You really don't want to know what it looks like at 0 dB.