i've been on a kick checking out power amps to run my subwoofers. so i've read up on a few things and here are some of the amps i'm considering to run 2 or 4 cheap subwoofers, each at an 8-ohm load. Crown XTi4000 Crest VS1500 (if i use 4 subs i'll need 2 of these) QSC RMX series i already have an XTi4000 for my tops, and if i had 2 of them i would just use their onboard DSP for xover and EQ. but i've heard they're not the best for subs the Crest i like because of it's high damping factor (1000 !). a bit heavier and larger than i would prefer, but the xti only has a damping factor > 500. RMX amps are also heavy, but there's something to be said for amps that are forgiving with line voltages. .. THOUGHTS??