IA 40.1 (used)
3600 watts @ 1 ohm
1800watts @ 2 ohm
900 watts @ 4 ohm
I've personally got about 4200 watts out of it at 1.25 ohms (12volt input).
Will do over 5000 watts on 16+ volt system (or lower impedance), and can handle up to 18 volts of input.
$750 shipped (lower 48)
Only interested trade would be a pair of Solo X 10's/12's, dual 2-ohm cones
Will ship UPS ground from Topeka Kansas