Detlof you have it right on the money regarding the DBX scene. The very best cassette decks ever made (Tandberg 3004 and Nak 1000ZXL), were always best with the Dolby left off no matter what tape formula was used I, II, or IV. There was degredation to the sound regardless of what NR was chosen. I felt that Dolby and DBX systems were only needed in the very early cassette era, when S/N ratios were down in the low 50db range. As the metal tape era dawned (1979/80), and S/N ratios improved, hiss levels reached an acceptable level. This is a perfect example of adding stages of circuitry and moving backwards.......Frank
