Experience the cutting edge of home cinema with the 7.2-channel TX-NR646 Network A/V Receiver, the first in its class to feature the revolutionary DTS:X™ and Dolby Atmos® multi-dimensional audio formats. Onkyo’s high-current amplification system drives your speakers to reproduce soundtracks with maximum impact and fidelity at 160 W/Ch. UltraHD video capability is equally impressive, with eight HDMI® terminals including dedicated HDCP 2.2 compatible inputs for premium 4K video content and two HDMI outputs for video in separate rooms. The TX-NR646’s high-grade 384 kHz/32-bit AKM DAC not only brings movies to life, but your Hi-Res and streamed music as well. Conveniently stream music over built-in Wi-Fi®, Bluetooth, AirPlay, or internet music services including Spotify Connect and Deezer. Use the free Onkyo Remote app to stream audio stored on your mobile device, browse and select tracks from online services, and control playback in two zones. Plus, for fans of vinyl, the TX-NR646 has a phono equalizer input to connect a turntable.

DTS:X™ Compatible
Supports Dolby Atmos® up to 5.1.2 Channels
160 W per Channel
Hi-Current Amp Design for Authentic Sound Reproduction
HDMI® 8 In / 2 Out Including 1 Front (4K UltraHD / HDCP 2.2)
Bluetooth Audio / Wi-Fi® with Spotify and AirPlay
DSD 5.6 MHz, FLAC 192 kHz/24-bit Hi-Res Audio Capable
384 kHz/32-bit Hi-Grade DAC
AccuEQ Room Acoustic Calibration

ADVANCED FEATURES
New DTS:X™ New Generation Sound Format Ready
Supports Dolby Atmos® Format for Exciting Multidimensional Sound
4K/60 Hz-Capable 4:4:4 HDMI® Terminals for UltraHD Entertainment*1
Supports HDCP 2.2 for Future 4K/Full HD Video Streaming and Broadcast*2
Built-in Wi-Fi® Certified Wireless LAN Capability
Bluetooth Version 2.1 + EDR Capability (Compatible Profile: A2DP v1.2, AVRCP v1.3) with Advanced Music Optimizer DSP Technology
Internet Radio and Music Streaming Subscription Services Included (TuneIn Radio, Spotify, and Deezer)*3
Playback Compressed, Lossless, and Hi-Res Audio via Local Network (MP3, WMA, WMA Lossless, FLAC, WAV, Ogg Vorbis, AAC, Apple Lossless, DSD 5.6 MHz, LPCM*4, and Dolby® TrueHD)
Proprietary AccuEQ Room Calibration with Mic Included
Advanced Music Optimizer to Improve Compressed Digital Audio Quality (Bluetooth Audio Included)
Control and Stream with Free Onkyo Remote Streaming Apps for iPod touch/iPhone*5 and Android™ Devices*6
PM Bass Boost for Deep Bass and Clear Mid-Range
Powered Zone 2 and Zone 2 Line-Out for Distributed Audio Playback in Another Room
Bi-Amping Capability for Front Channels

*1 6G video is supported on HDMI inputs 1/2/3, Main Out, and Sub Out. *2 HDCP 2.2 is supported on HDMI inputs 1/2/3, Main Out, and Sub Out. *3 Availability of services depends on region. Some services may require a paid subscription and firmware update. Availability of third-party services advertised here is accurate at the time of publication, but may be subject to change without notice. *4 LPCM is supported via DLNA only. *5 Compatible with iPod touch (3rd generation or later) and iPhone 3GS or later. All models require iOS 4.2 or later.  *6 Requires Android 2.1 or later.

AMPLIFIER FEATURES
160 W/Ch (6 Ω, 1 kHz, 1% THD, 1 Channel Driven, IEC);175 W/Ch (6 Ω, 1 kHz, 1 Channel Driven, JEITA)
WRAT (Wide Range Amplifier Technology)
H.C.P.S. (High Current Power Supply) Massive High Power Transformer
Discrete Output Stage Circuitry
Optimum Gain Volume Circuitry
PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio

PROCESSING FEATURES
HDMI Support for 4K/60 Hz, 3D, Audio Return Channel, DeepColor™, x.v.Color™, LipSync, Dolby Atmos®, Dolby® TrueHD, DTS:X™, DTS-HD Master Audio™, DVD-Audio, Super Audio CD,
Multichannel PCM, and CEC
Dolby® TrueHD and DTS-HD Master Audio™ Decoding
AK4458 384 kHz/32-bit DAC (8 Channels x 1)
Dual 32-bit Digital Signal Processing Engines
4 DSP Modes for Gaming: Rock, Sports, Action, and RPG
Theater-Dimensional Virtual Surround Function
CinemaFILTER™
Direct Mode
Double Bass Function
Non-Scaling Configuration
A-Form Listening Mode Memory

CONNECTION FEATURES
8 HDMI Inputs (1 Front/ 7 Rear) and 2 Outputs
USB Port
Mass Storage Class USB Memory Playback Capability
2 Component Inputs
3 Composite Video Inputs
3 Digital Audio Inputs (2 Optical and 1 Coaxial)
8 Analog Audio Inputs
Phono Input for Turntable Connection
2 Parallel Subwoofer Pre-Outs
Location Numbered Speaker Terminal

OTHER FEATURES
Crossover Adjustment for Each Channel (40/50/60/70/80/90/100/120/150/200 Hz)
A/V Sync Control (Up to 500 ms in 10 ms Steps at 48 kHz)
Graphical Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up
Hybrid Standby Function with HDMI Passthrough
Smart Grid-Ready
Tone Control (Bass/Treble)
3-Mode Display Dimmer (Normal/Dim/Dimmer)
40 FM/AM Random Presets
Certified with DLNA Version 1.5
Firmware Updates via Ethernet and USB
RIHD (Remote Interactive Over HDMI) for System Control
Preprogrammed RI (Remote Interactive) Remote Control

DTS:X™ Compatible
DTS:X is a next-generation object-based surround sound technology that includes height to deliver a fully-immersive listening experience to your living room. DTS:X provides listeners the ultimate in flexibility, immersion, and interactivity.
Supports Dolby Atmos® Up to 5.1.2 Channels
Dolby Atmos transports you from an ordinary moment into an extraordinary experience with captivating, multidimensional sound that fills your room and flows all around you to move your mind, body, and soul.
Hi-Current Amp Design for Authentic Sound Reproduction
High instantaneous current enhances speaker control for accurate and dynamic audio reproduction. It's the cornerstone of Onkyo’s amplification philosophy.
HDMI® 8 In / 2 Out Including 1 Front (4K UltraHD / HDCP 2.2)
All HDMI terminals support 4K/60Hz, as well as HDCP 2.2 for next-generation UltraHD streaming and broadcasting.
Bluetooth Audio / Wi-Fi® with Spotify and AirPlay 
Stream virtually any audio from your smartphone, tablet, or PC to your home cinema for clear and powerful sound. Available internet radio and music subscription services include Spotify and many more.
DSD 5.6 MHz, FLAC 192 kHz/24-bit Hi-Res Audio Capable
Onkyo A/V receivers are engineered for universal Hi-Res compatibility and ease of use. Use the remote app to locate your 192/24 and 96/24 albums (including 5.6 MHz DSD playback) on PC or NAS and bask in the clarity, depth, and detail of high-resolution music.
384 kHz/32-bit Hi-Grade DAC
A premium-quality AK4458 digital-to-analog converter from Asahi Kasei unlocks the full potential of any audio format, thanks to unique low-distortion filtering technologies for clear sound.