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TX-NR646
Experience the cutting edge of home theater 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 170 W/Ch. UltraHD video capability is equally impressive, with eight latest spec 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 Pandora. 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.
Features
Amplifier
| # Channels | 7.2 |
| Power Watts/Ch (6 Ohms 1kHz, 1 Channel Driven, FTC) | 170, 0.09% THD |
| Power Watts/Ch (8 Ohms 20-20kHz, 2 Channels Driven, FTC) | 100, 0.08% THD |
| WRAT (Wide Range Amplifier Technology) | ✓ |
| H.C.P.S. (High Current Power Supply) | ✓(Massive High Power Transformer) |
| THX Certified | - |
| Continuous 6 Ohms Rated | ✓ |
| Certified 4 Ohms Performance | - |
| Discrete Output Stage Circuitry | ✓ |
| 3-Stage Inverted Darlington Circuitry | - |
| PUSH-PULL Design | ✓ |
| Independent Block Construction (Amp/Preprocessor) | - |
| High-Grade Toroidal Transformer | - |
| Independent Power Supply | ✓ (x2) |
| Bi-amp Capability For Front | ✓ |
Processing
| Dolby Atmos | ✓ |
| 32-Bit Digital Signal Processing Engine | ✓ |
| Dolby Decoder | Atmos, True HD, DD Plus |
| DTS:X | ✓ |
| DTS Decoder | DTS: X, DTS-HD Master Audio |
| ONKYO GAME Surround Modes | ✓ (Rock, Sports, Action, RPG) |
| VLSC for Noiseless Audio Processing | - |
| THX Processing Mode | - |
| AccuEQ Room Calibration | ✓ (Advanced) |
| Phase-Matching Bass Boost | ✓ (for Deep Bass and Clear Mid-Range) |
| Direct/Pure Mode | ✓ /- |
| Pure Direct Analog Path Mode | - |
| Advanced Music Optimizer | ✓ (Bluetooth Included) |
| 384K/32 Bit DACs | ✓ (Asahi Kasei AKM4458) |
| 192K/32 Bit DACs | - |
| 192K/24 Bit DACs | - |
| isf Certified Calibration Control | - |
Connectivity
| Audio I/O | 7 / 0 |
| Phono Input | ✓ |
| Digital Audio IN (OPT/COAX) | 2 / 1 |
| Composite Video I/O | 3 / 0 |
| Component Video I/O | 2 / 0 |
| Front Panel HDMI | ✓ |
| Front-Panel A/V | - |
| Front-Panel Optical | - |
| USB Input | ✓ (Rear) |
| HDMI I/O | 8 / 2 |
| HDMI 4K/60 Hz- Capable HDMI Terminals | ✓(HDR Support) |
| HDCP 2.2 Copy-Protection Compatibility | ✓ (3 in / 2 out) |
| HDMI Support for High Dynamic Range | ✓ |
| HDMI Support for 3D, Audio Return Channel and CEC | ✓ |
| BT.2020 Support | ✓ |
| HDMI Support for Deep Color, x.v.Color, LipSync | ✓ |
| HDMI Support for DVD-Audio, SACD, Multichannel PCM | ✓ |
| InstaPrevue Input Source Prevue | - |
| MHL for Mobile Device Connection | - |
| Composite to Component Video Upconversion | - |
| Analog To HDMI Upconversion | ✓ (from 480i/576i) |
| 1080p Upscaling | - |
| 4K (up to 4096 x 2160) Upscaling | - |
| 4K Passthrough | ✓ |
| Analog Pre-Outs | Subwoofer (x2) |
| XLR Pre-outs | - |
| 18mm Pitch High Grade Pre-outs | - |
| Speaker A/+B | - |
| Powered Zone 2 | ✓ |
| Powered Zone 3 | - |
| Zone 2 Line Out | ✓ (Fixed) |
| Zone 2 Video Out | - |
| Zone 2 Digital to Analog Audio Conversion | ✓ (S/PDIF, NET, USB) |
| Zone 3 Line Out | - |
| Whole House Mode | - |
| Made for iPod, iPhone, iPad | ✓ |
| Airplay | ✓ |
| Supports Onkyo Remote App | ✓ (iPod touch/iPhone and Android-Powered Devices) |
| Internet Radio Capable | ✓(Pandora, Spotify, Sirius, Slacker, TuneIn, Deezer) |
| Spotify Connect Support | ✓ |
| Streaming Audio From PC / Network | ✓ (DLNA, Home Media) |
| Hi-Res Streaming Audio Formats | ✓(Apple Lossless, DSD 2.8/5.6 MHz, Dolby TrueHD, FLAC 192/24, LPCM, Ogg Vorbis, WAV, WMA) |
| Streaming Audio From USB memory | ✓ |
| Wireless Network | ✓(Apple Lossless, DSD 2.8/5.6 MHz, Dolby TrueHD, FLAC 192/24, LPCM, Ogg Vorbis, WAV, WMA) |
| Bluetooth | ✓(Built-in) |
| PC Input (15 pin D-sub) | - |
Integration Access
| RS-232 | - |
| IR Input | - |
| IR Output | - |
| Ethernet | ✓ |
| ONKYO-RI System Control | ✓ |
| RIHD (Remote Interactive Over HDMI) | ✓ |
| 12V Trigger | - |
Miscellaneous
| Pre-Pro/Learning Remote | ✓ /- |
| On Screen Remote Programming | ✓ |
| Hybrid Standby Function | ✓ (to Reduce Power Consumption) |
| Smart Grid-Ready | ✓ |
| Auto Speaker Calibration W/Mic. | ✓ (AccuEQ - Advanced) |
| OSD Out | ✓ (Advanced "Home" GUI) |
| Solid Aluminum Front | - |
| Transparent High-Grade Speaker Terminals | - |
| Detachable AC Cord | - |
| Warranty | 2 YEARS |
Docs
Spec Sheet
For more technical detail, download the Spec Sheet here:
TX-NR646 Product Sheet
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Product Manuals
Download the Product Manuals for TX-NR646 here:
TX-NR646 Owner's Manual - English
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TX-NR646 Owner's Manual - Spanish/French
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Firmware Updates
- Latest firmware update instructions: TX-NR646 Firmware Update Instructions .
- Latest firmware update: TX-NR646 Firmware Update .