This may be the simplest question of all... I have a Samson Servo 550 (275w/channel@8ohms, 550w bridged@4ohms) stereo power amp that I'd like to run for PA or bass rig setups. Do I just leave the gain all the way up on both channels and control my final output at the board when used for a PA system or with a bass preamp when used for my bass rig? ...or should I really back off the power amp gain by some reasonable level to keep it from clipping? I've been in the habit of running it for a stereo keyboard application with the gain control knobs set around 75%. For a bass rig, I'm now considering taking the XLR out of my Hartke Kickback12 and going into a mixer, then through the power amp into my Ampeg Cabs. What type of sound quality should I expect? This way I still get the Kickback for a stage monitor, too. Thanks for your experienced replies.