All Polk Audio products products ship new, in factory sealed boxes.The Polk Audio Blackstone TL1600 high-performance 5.1ch home theater system features 4 matching satellite loudspeakers, a horizontal center-channel speaker, and a powered subwoofer. The Polk Audio Blackstone TL1600 system offers a compact, high-performance solution for your home theater, music listening, or gaming needs. Plus you can add individually available, perfectly timbre-matched Blackstone TL speakers to expand your home theater experience into 6.1, 7.1, or 9.1 channels. Note: The systems overall frequency response is 40Hz-22kHz and the -3dB frequency response is 45-20kHz. Features includes four compact satellite speakers, a center channel speaker, and a subwoofer Time Lens technology aligns the drivers for better soundstaging and imaging aperiodic tuned rear port curved enclosures with high-gloss finish to complement todays flat-panel TVs frequency response: 45-20,000 Hz (-3 dB) impedance: 8 ohms threaded insert for use with optional speaker stands or brackets keyhole slots for easy wall-mounting warranty: 5 years TL1 Satellite Speakers: 1/2" silk dome tweeter (each) 2-1/2" Dynamic Balance midrange (each) sensitivity: 89 dB handles up to 100 watts 3-13/16"W x 6-1/2"H x 4-7/8"D (each) TL1 Center Channel Speakers: 1/2" silk dome tweeter dual 2-1/2" Dynamic Balance midranges sensitivity: 89 dB handles up to 125 watts 15"W x 3-15/16"H x 3-7/16"D TL1600 powered subwoofer: 8" down-firing woofer built-in 50-watt (RM