Pyle Home PHSA5 5.1 Home Theater System With Active Subwoofer and Five Satellite Speakers 100W Active Subwoofer with Built-In Auto-Gain Control - Impedance: 4-8 Ohms - Frequency Range: Satellites - 150Hz-20kHz, Subwoofer - 50Hz-330Hz - Center Channel Dimensions: 9.3'' x 4.7'' x 3.1'' Stereo RCA Line-In Input - Magnetically Shielded Center Speaker - Drive Unit: Satellites - 3 Inch, Subwoofer - 10 Inch - Materials: Satellites - Plastic, Subwoofer - Wood Stereo RCA Line-Out - S/N Ratio: 85dB - Subwoofer Dimensions (DxWxH): 7.9'' x 20.7'' x 14.4'' - Weight: 35.3 lbs 10'' Long Throw Driver - THD: 0.1% - L,R Channel Dimensions: 3.1'' x 4.7'' x 6.3'' - Color: Piano Black Lacquer Finish Crossover Slope Adjusted to 80Hz - Output power: Subwoofer 100W - Surround Channel Dimensions: 3.1'' x 4.7'' x 6.3''. Active Subwoofer (Need amplifier to Power the smaller speakers)