Onkyo HTS870THX 6.1 HTIB with THX Select Includes - 2-Way Bass Reflex Front Speakers with Dual 5 1/4 A-OMF Woofers, 1 Tweeters; 2-Way Bass Reflex Surround/Surround Back Speakers w/4 Cone Woofers, 1 Tweeters; 2-Way Bass Reflex Center Speaker with Dual 4 A-OMF Cone Woofers, 1 Tweeter; Dual-Drive Bass Reflex Subwoofer with Built-In 220 Watt Amplifier, Dual 8 Woofers; Onkyo 6.1 Channel Receiver; Remote Control; Speaker connect wire; Instructions; Onkyo 2-Year Limited Warranty. HDTV-Capable (50 MHz) Component Video Switching (2 Inputs, 1 Output) 4 Digital Audio Inputs (3 Optical, 1 Coaxial), 4 S-Video Inputs, 2 Outputs WRAT (Wide Range Amplifier Technology) Preprogrammed RI (Remote Interactive) Remote Control