Theater Solutions SUB8SM Slim Subwoofer (Mahogany) Theater Solutions SUB8SM slim 4.75" height design fits under most furniture, 250 watts peak power, frequency response is 35Hz-150Hz, 24dB per octave crossover, 8ohm impedance Built in digital drive high efficiency amplifier, 8" high efficiency low frequency down firing transducer, L/R RCA inputs, high level L/R input and output spring terminals Variable 35Hz to 150Hz control knob, gain control knob, 0 or 180 degree phase switch, built-in auto shut off, bottom slotted bass port, mahogany finish High density MDF enclosure with advanced RFL bass reflex design, product dimensions (H x W x D) 4.75"  24.625"  15.75", 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