Here are the specs on this subwoofer: 1500-WATT MONO AMPLIFIER BUILT-IN VARIABLE ELECTRONIC CROSSOVER REMOTE BASS LEVEL CONTROL INCLUDED FEATURES: POWER INPUT: 1200-W RMS x 1-CHANNEL @ 4-Ohm POWER INPUT: 1500-W RMS x 1-CHANNEL @ 2-Ohm SIGNAL-TO-NOISE: 108dBA REFERENCE RATED POWER INTO 4-OHM 20Hz - 330Hz FREQUENCY RESPONSE REMOTE BASS LEVEL CONTROL INCLUDED DIMENSION: 18-9/16"(L) x 10-3/8"(W) x 2-1/8"(H) Please let me know how good this sub performs. Found one for 349.00 with free shipping. Thanks