Quote:We can figure out by phone what's causing it and then figure out how to make it lower.
Two years ago when I got the ZP3 I worked hard to see if I could make the hum go away but it persisted despite two different TTs and even using a dummy load resistor in place of the TT. I pretty much decided then that it was part of my system and not an issue when playing music. Also, now that I have a ZMC1 in place, audible hum has been reduced since I more than doubled my ZP3 input from my cart -- as Steve predicted.
So, although I wont pass up an opportunity to lower noise, I don't consider it to be more than a very minor annoyance at this point.
Aside: Recently, while waiting for my ZMC1 I ran my .45 mV cart straight into my ZP3--CSP3--ZMA. I put up with a lot of hum due to the super high gain settings but the sound was still so great that I really didn't mind. Compared to that, now it's nothing.
Darrwood, what tubes are you using that have reduced hum? I haven't had much success in that area.