Onkyo TX-NR646 7.2-Channel Network A/V Receiver (Certified Refurbished) This Certified Refurbished product is tested & certified to look and work like-new. The product includes all original accessories, and is backed by a 1 year warranty. DTS:X is a next-generation object-based surround sound technology that includes height to deliver a fully-immersive listening experience. Supports Dolby Atmos Up to 5.1.2 Channels for captivating, multidimensional sound High instantaneous current enhances speaker control for accurate and dynamic audio reproduction with 170 W/Ch. (6 Ohms, 1 kHz, 0.9% THD, 1 Channel Driven, FTC) and 100 W/Ch. (8 Ohms, 20 Hz-20 kHz, 0.7% THD, 2 Channels Driven, FTC) 4K/60 Hz-Capable HDMI 2.0a Terminals for UltraHD and supports HDCP 2.2 for premium 4K/Full HD video streaming and broadcast Built-in Bluetooth, Wi-Fi and Airplay with Pandora and Spotify to stream virtually any audio from your smartphone, tablet, or PC for clear and powerful sound