I just bought one on Ebay and would like to know from people who own one for settings. I've played with it and I found that i have to turn the THRESHOLD knob almost all the way to get the hiss to go away. The RATIO knob is set at its minimum. I noticed that if I turn the threshold all the way I get like a compressor-like breathing pumping out of it. I also noticed that it quiets the "hisses" only when I'm not playing, but when I play the noise is still there. Is that how it's suppossed to be?? Sorry but it's the fisrt time I've used one of these and I have no manual. Any help is welcome. PS. I run my rack: bass>preamp>compressor>Boss NS-50>into the retunr of the preamp and preamp out to poweramp. I hope this is how it's suppossed to be!