Kenwood Excelon XR1001-1 Reference Series Mono Subwoofer Amplifier - 1,000 watts RMS x 1 at 2 ohms Kenwood's Excelon Reference Series XR1000-1 mono amplifier can power your subwoofer with up to 1,000 watts RMS. (That's a real world rating, not that inflated number you find printed on some amps.) An advanced circuit design and upgraded components virtually eliminate noise and maximize sound quality. 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. Product Highlights: 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 amp 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) Wired remote volume control included More Features: Cooling fan Preamp inputs and outputs Speaker-level inputs (require speaker wi