I'm currently running 2 subs -- Peavey Subcompact 15s, rated 400w program/200w continuous, powered by a QSC PLX3002 in stereo @ 550w per channel (8 ohms). I'm thinking of replacing the two Peaveys with one Yorkville Unity USC1 15" sub, rated 1200w program/???? continuous. I'll use the same QSC PLX3002, but run it bridged to get 1800 watts for the 8 ohm load. My question is this: How much will the higher quality single Yorkville outperform the two lower quality Peaveys? Blow the Peaveys out of the water? Just a small difference?