@ellajeanelle there is absolutely no hiss.In fact there is not even an audible click when switching to bypass or back again. This is with very sensitive Zu speakers.I'm using it between the dac and pre. When reading what other users think of the SR24 some are not comfortable with the knobs that don't click into place - they move smoothly and freely. So you can't easily repeat a setting without writing it down.To me it's a good thing to be able to find a 'perfect' setting just beyond one of the marked dots rather than forced to choose one or the other. I don't know enough about circuitry to know if freely moving moving controls are partially responsible for no audible noise or it's just the choices made in the design of the output circuitry.
Changing the subject for a minute back to what it does in my system for a bad recording..... James Gang Live in Concert (1971).Amps cranked up to 11 to achieve a big sound with only the three guys. Joe's amp I would describe as literally 'roaring'.Lo neutral 0,Mid/Lo up a bit at 120hz,Mid/Hi down a bit at 650hz,Hi neutral 0.The 'roar' remains but I can hear more clearly what Joe's playing,Dales bass plucking is SO clear and textured,there is much,MUCH,more going on with the drum set (Jim Fox) than I've been able to discern in the past from this recording.I saw them live back in the day,and also Joe and Barnstorm, and remain a fan.Another CD that cleans up nicely is Mad Dogs and Englishmen which is quite a mess in the mids.What I have found so far is when I can bring into balance the area where the instruments and vocals are compressed together the frequencies on either side almost always smooth out with little or no help.