KLH AT2100i 400 Watt Amplified Television Home Audio System 400 watts peak music power output (PMPO) with dynamic peak compression 8" long throw subwoofer with fiber cone, large radius surround, vented pole, 1.5" voice coil, 40 ounce magnet 2-way D'Appolito configured satellite speakers with dual 4" woofers and 5/8" polycarbonate domes No receiver required - The subwoofer's 3-channel amplifier eliminates the need of a receiver Complete package contents: Subwoofer, 2 satellite speakers, 2 adjustable stands, wall mounting brackets, hook-up wire