Yamaha DTX-3000 6.1-Channel DVD Home Theater in a Box 6.1-channel home theater system with 5 surround speakers, center speaker, and subwoofer 5-disc DVD changer employs progressive scan technology for high-resolution picture 600-watt A/V receiver (100 watts x 6) with 32-bit Cinema DSP processing and 29 surround modes Overall frequency response of 28 Hz to 50 kHz; 130-watt, 8-inch active subwoofer 4 digital audio inputs (3 optical and 1 coaxial); includes universal remote; 1-year warranty