I am selling a competition 1100D Directed amp, pushes 1100 watts stable at one ohm, but I have heard it will do 1/2 ohm. It comes paired with a 12 inch Alphasonic dual voice coil, high excursion subwoofer in a sealed box. I paid $700 for the amp and $350 for the subwoofer and box. The amp at one time powered 2 1200 watt DVC Rockfords with no problem.  The first $300 takes it.