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. Features - Class D Dual Σdrive Speaker Level Input Signal Sensing Turn-on Terminal Cover Cooling Fan Power MOS-FET Switching Power Supply Extruded Aluminum Heat Sink Design Line Output Terminals for Extension Specifications - Signal to Noise Ratio: 100dB (Reference: Rated Power into 4Ohms at 14.4V) Frequency Response: 20Hz-200Hz (+0dB, -3dB) Input Impedance: 10k ohm Speaker Impedance Bridged connection: 4Ω (2Ω to 8Ω allowable) Audio Section - Low-Pass Filter: Built in Variable Low-Pass Filter (50Hz-200Hz, -12/-24dB/oct) Infrasonic Filter: Built in Variable Infrasonic Filter (15Hz-40Hz, -24dB/oct) Bass Boost: Built in Bass Boost Control (40Hz, 0dB-+18dB) RCA Input Sensitivity: 0.2[V] - 5.0[V] Speaker Level Input Sensitivity 4.0[V] - 12.0[V] Terminals - Battery & Ground XR Series Type Terminal (capable for 4 guage)(Ni) P.CON XR Series Type Terminal (capable for 8 guage) Speaker Output: XR Series Type Terminal (capable for 8 guage) Line In: RCA (Gold Colored) Line Out: RCA (Gold Colored) Speaker Input RCA IN A Channel