Kicker CXA1200.1 Class D 1200w @1 and 2 ohm, 1200 Watt Mono Subwoofer Amplifier
This amplifier works with 1-ohm loads, so you won't have to worry too much about matching impedances when you add a second or third sub to your system. Mono subwoofer amplifier. 1200 watts RMS +/-10% x 1 at 1 ohm.