I would not recommend what you are about to do. The impedances you are looking at are nominal. The impedance will swing up or down and there isn't much down left at 2 ohms. I seen a D1200 roast trying to drive an Infinity Kappa 9 which are legendary for wild impedance swings. They are decent amps but I don't think they will take the 2 ohm load for long. You can get a Velodyne SPL 1200 for a little over $1,200. with a 12" woofer and 750 watt digital amp. They make a 15. These will shake your foundation. REL is also very good but I think they start at around $2,500. I shouldn't think you would have bottoming out problems if the sub was set properly. The gain should be left somewhere below 12 o'clock in order to leave the amp plenty of headroom.