Amazing Powered ACOUSTIC PROFILES Subwoofer Model PSL-SUB10P If you've ever heard one, you know you need one. Makes an unbelievable difference to your sound system. Frequency Range: 25 Hz to 250 Hz. 10-inch long-throw woofer with a PVA treated cone for enhanced bass response. 400-watt peak power integrated amplifier. Signal Sensing Auto ON/OFF: This feature automatically turns the subwoofer on when it senses an audio signal and off when the signal is absent, conserving power. Phase Control: The 0-180 degree phase control switch allows for adjusting the subwoofer's phase to optimize its integration with the main speakers. Crossover Control: allows users to adjust the frequency at which the subwoofer begins to play, with a range of 40-140 Hz. Lay it flat and use it as a table, or put it on its side for a higher table, or stand it on end for an even higher table. Let your imagination go wild. .