One of my very good friends is a bass player in another band who recently got set up with a new rig... an Ampeg SVT 450H head, and an Ampeg 610HLF cabinet. Now using common sense, we BOTH would imagine that these would be an "optimum" configuration as they are very similar in power, yet using the 450H head on the cabinet, it sounds like the head is just forcing the speakers beyond belief. Although not a cab pairing problem... it seems like the preamp clip is ALWAYS on and no matter what gain. I actually played a show using my friend's cabinet and MY head, which is an SWR Workingman's 4004 400 watt, playing my "normal" stage volume, and normal EQ and gain settings, and everything sounded fine. I've always understood that there is much greater of a problem when you underpower a cabinet than if you are over powering. IE, using a 150 watt head with an 8x10 cabinet that can handle 1600 watts is worse than running a 1600 watt SVT4 Pro through a 200 watt cabinet at a very low volume. Is this head/cabinet the right configuration? What are we doing wrong? The head is 450 watts @ 4 ohms and 250 watts @ 8 ohms. The cabinet is 4 ohms, and shows program handling at 1200 watts. Why would this be wrong?