Just got a new amp (Sundown SAZ-1000D) and now I'm looking to upgrade my sub. My old amp was only stable down to 2 ohms, so my current sub is a dual 4 ohm 12" Type-R in a 2 cu. ft. box tuned to 32 hz. Looking to get something I can wire down to 1 ohm to fully utilize this new amp, and that...