Kenwood Excelon XR1000-1
Mono subwoofer amplifier — 1,000 watts RMS x 1 at 2 ohms
GENERAL FEATURES:
mono subwoofer amplifier
500 watts RMS x 1 at 4 ohms (1,000 watts RMS x 1 at 2 ohms)
CTA-2006 compliant
Class-D amplifier design
frequency response: 20-200 Hz
variable low-pass filter (50-200 Hz, 12 or 24 dB/octave)
variable subsonic (infrasonic) filter (15-40 Hz, 24 dB/octave)
adjustable bass boost (0-18 dB at 40 Hz)
preamp inputs and outputs
speaker-level inputs (require HI LO CONVERTER ) feature signal-sensing turn-on
fuse rating: 40A x 3
4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
12-5/8"W x 2"H x 6-11/16"D
warranty: 2 years
There's power and then there's POWER. 
The Kenwood Excelon XR1000-1 sub amplifier powers your sub with up to 1,000 watts RMS, and that's a real world rating, not that inflated number you find printed on a lot of amps. Even better, the XR1000-1 can fit into many different places in your car because of its incredibly low profile — it's only 2" tall.