Theater Solutions SUB10F 350 Watt Home Theater Subwoofer (Black) Theater Solutions SUB10F powered ported bass home theater subwoofer, 350 watts peak power, frequency response is 25Hz-150Hz, 24dB per octave crossover, 8ohm impedance Built in digital drive high efficiency amplifier, 10" high efficiency low frequency front firing transducer, L/R RCA inputs, high level L/R input and output spring terminals Variable 25Hz to 150Hz control knob, gain control knob, 0 or 180 degree phase switch, built-in auto shut off, front slotted bass port, black ash finish High density MDF enclosure with advanced RFL bass reflex design, product dimensions (H x W x D) 15.25"  12.5"  12.25", designed and engineered in the USA Full instructions, 9 10 dual RCA cable, and "Y" adapter included, use for in wall or in ceiling home entertainment, home theater systems, surround sound systems and multiple room systems