7-channel amplifier90 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD, with 2 channels drivenDolby®, DTS®, and Auro-3D® surround sound decodingDolby Atmos® processing for use with in-ceiling or "height" speakers for more enveloping home theater soundDolby Atmos Height Virtualization and DTS Virtual:X® create three-dimensional effects without height speakersAudyssey speaker calibration and system optimization includes:auto setup and room calibration delivers balanced, dynamic sound with enhanced surround performanceDynamic Volume anticipates loud sounds to keep volume levels evenDynamic EQ improves dialogue, bass response, and surround channel levels at lower volumesAudyssey MultEQ Editor app for further audio customization (paid app; not included)Digital and streaming music options:built-in Wi-Fi for listening to music from a networked PC, free internet radio, and music servicesHEOS Built-in technology wirelessly connects compatible HEOS components for whole home audioincludes support for Pandora®, SiriusXM, and Spotify® (subscription required for some services)free HEOS app offers easy Wi-Fi control, settings adjustments, and music selection and playbackApple AirPlay 2 lets you stream directly from an iPhone® or iPad® and ask Siri to play Apple Music®supports multi-room audio with compatible wireless speakersbuilt-in Bluetooth for wireless music listening with smartphones, tablets, and compatible computersBluetooth transmission for sending audio from the receiver to Bluetooth-enabled headphonesplay audio through Bluetooth headphones only, or through Bluetooth headphones and connected speakers simultaneouslyplays high-resolution digital music files via USB storage device or a networked computer (PCM up to 24-bit/192kHz resolution; DSD up to 5.6 MHz)Denon's Compressed Audio Restorer improves sound quality of MP3s and other digital music filesworks as a Roon player (requires subscription and Roon Core running on your network)Roon Core is media server software that runs on your computer, NAS drive, or other compatible hardwareMulti-room audio/video:dual-room/dual-source outputamp assign function lets you use surround back speaker outputs for powered Zone 2 speakersusing powered 2nd-room output allows 5.2-channel sound in main roomAll Zone Stereo mode ensures that both zones stay in sync when playing the same sourceAll Zone TV Audio lets you play surround sound in your main room and downmixed stereo in your 2nd roomsupports both analog and digital audio connectionsZone 2 compatible audio sources: HDMI audio, optical/coaxial digital inputs, analog audio inputs, AM/FM tuner, USB, Bluetooth, and HEOS music appscannot select different USB/Bluetooth/network sources for each zoneConnections:HDMI 2.1 audio/video switching: 6 in, 2 out1 input and 2 outputs support 8K/60Hz and 4K/120Hz videoall inputs and outputs support 4K/60Hz videoHDCP 2.3 technology ensures compatibility with Ultra HD sources and TVsHDR-compatible for extended picture contrast and brightness with compatible TVs and HDR-encoded contentsupports HDR10, HDR10+, Dolby Vision™, and HLGHDMI standby pass-through allows HDMI switching without powering up receivergaming-optimized video processing technologies for a smooth, lag-free gaming experienceVariable Refresh Rate (VRR), Auto Low Latency Mode (ALLM), and Quick Frame Transport (QFT) reduce or eliminate lag and frame tearingsupports ARC (Audio Return Channel) and eARC (Enhanced Audio Return Channel)eARC receives uncompressed surround sound signals including Dolby Atmos and DTS:X via the HDMI connection with your compatible TV