I'll just briefly add that in regards to WB AGC fighting pre-processing issue, I completely removed the WB AGC action by raising it's threshold practically out-of-reach. This can be done with the "para 666 1" command that can be issued from the command line via serial interface, or from the remote control software if you put that command as a trigger and apply it (hit test button). If you also turn off gate, the WB AGC Will sit at 0 dB gain reduction doing nothing, but the gain structure it provides will stay, and I found that to sound better. With WB AGC disabled the gain loss is significant and you have to make up for that with input gain and master drive. In my situation that required maxing out input gain and also using increased master drive and, like I said, I preferred the previous solution. I know Frank will now probably chime in tell you to disregard this and that you don't do it, and I'm not recommending any of this, I'm just explaining how I used it and what I liked. YM, of course, MV.