ok, i purchaced a couple of eq's on ebay. one was an ashly sc-66a, which i like. ( if anyone knows anything about the balanced xlr mods to this unit please drop me a line). the other, getting to the point, was a 7 band notch filter ( model sc-68). it seems like a straight forward cut-only eq, except one knob that is labled "speed" (slow to fast of course). two other sets of switches labled setup and operation are almost as baffling. i would have plugged it in to play with it, but it is in need of a new power cord. any insight would be helpfull ( and possibly entertaining) thanks.