Power and Processing: 9-channel amplifier 140 watts per channel into 8 ohms (1kHz) at 0.08% THD, with 2 channels driven Class D3 amplification offers energy efficiency, cooler operation, and robust power driving all channels Dolby® and DTS® surround sound decoding Dolby Atmos processing for use with in-ceiling or "height" speakers for more enveloping surround sound (firmware update required) 4K video upconversion with Marvell Qdeo™ processing for analog and digital signals Multi-Channel Acoustic Calibration Pro automatically optimizes your speakers for your room and setup (microphone included) independent calibration for dual subwoofers, Subwoofer EQ, and Standing Wave Control help deliver accurate, even bass throughout the room Precision Distance allows you to make speaker setup adjustments within a millimeter, for pro-quality room calibration Digital and Streaming Music Options: Internet-ready for listening to music from a networked PC, free Internet radio, and online music services includes support for Pandora and thousands of free Internet radio stations with vTuner Spotify Connect lets you play Spotify's streaming music library through the receiver via your smartphone or tablet (requires Spotify app and a premium subscription) Apple AirPlay for streaming music from an iPhone, iPad, iPod touch or computer running iTunes DLNA 1.5 and Windows® 8 certified for streaming music wirelessly from compatible computers and network-attached storage (NAS) drives plays high-resolution digital music files via USB storage device or a networked computer