Onkyo TX-NR636 7.2-Channel Network A/V ReceiverBringing Next-Generation Entertainment to Your Home The TX-NR636 features HDMI supporting 4K/60 Hz and 21:9 display format and HDCP 2.2 copy-protection compatibility. Qdeo upscaling technology also converts low-res DVDs and games into pin-sharp Full HD or 4K (if you have an Ultra HD display). TX-NR636 paves the way for Ultra HD video playback at a liquid-smooth 60 frames per second. This is great news for PC gamers who can now add wall-shaking surround sound to their 4K/60 Hz experience. Polk Audio 5.1 TL1600 Speaker System Big Speaker Sound Without The Big Speaker Whether you're looking for your first home theater sub/sat system or want to upgrade to more performance you're in for a big surprise in a small compact package from Polk Audio. The predecessor to Blackstone TL our RM series was always about "Big Speaker Sound Without The Big Speaker." Blackstone TL represents a significant leap forward delivering an astonishing home theater performance never before heard in compact loudspeakers. Features Time Lens Technology-The acoustic centers of the tweeter and mid-bass driver are located in the same plane for superior imaging TL1 Satellite Aperiodic-Tuned Rear Port enables better blending with a subwoofer TL1 Center Channel Tuned Rear Port maximizes the low end response of the dual driver design for superior blending with the satellites and the subwoofer Downward Firing Powered Subwoofer.