DTS:X Compatible

DTS:X is a next-generation object-based surround sound technology that includes height to deliver a fully-immersive listening experience. DTS:X provides listeners the ultimate in flexibility, immersion, and interactivity. Unlike channel-based audio, you will be able to personalize your audio experience. For example, you can turn up JUST the dialog within a mix. DTS:X allows you to customize to your room layout as well as control dialog and dynamic range.

Supports Dolby Atmos® Up to 5.1.2 Channels

With Dolby Atmos, sound comes alive from all directions, including overhead. The format combines a channel-based audio bed with object-oriented sound to place and move specific effects around the room, creating a breathtakingly realistic and captivating sonic atmosphere. 

Sound designers and artists are free to mix in a 3D space, steering effects through surround channels and adding a seamless overhead dimension with discrete height channels. 

Additionally, a new Dolby surround up-mixer allows for your current channel-based content (that has not been mixed for Dolby Atmos) to be expanded to fill the flexible speaker layouts of a Dolby Atmos system.

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Ready for 4K UltraHD

The latest HDMI specification and HDCP 2.2 compatibility support the latest formats and technologies planned for Hollywood content. This latest HDMI spec offers a significant increase in bandwidth (up to 18Gbps) to support new features such as 4K@50/60 (2160p), which is 4 times the clarity of 1080p/60 video resolution, and 4:4:4 color space. 

This Onkyo AVR enables transmission of High Dynamic Range (HDR) formats, and provides enhanced picture quality by simultaneously enabling greater detail for both the dark and bright parts of an image.

Bluetooth / Wi-Fi® with Pandora, Spotify, and AirPlay

The TX-NR646 has AirPlay, Wi-Fi and Bluetooth technologies built in. The free Onkyo Remote app puts a range of streaming options at your fingertips, from universal hi-res audio via network-attached devices to internet streaming services to music on your smartphone and tablet. Or pair up and enjoy whatever's playing on your Bluetooth-compatible device for huge cinematic sound. 

This receiver comes loaded with Spotify, Pandora, SiriusXM Internet Radio, Slacker and TuneIn. You can select a station and search for music available on these services via the Onkyo Remote app on your phone. You'll never be short of your favorite music to enjoy.

Hi-Current Amp Design for Authentic Sound Reproduction

From the quietest dialog passages to booming action scenes, Onkyo's exclusive amplification technology dramatically enhances the audio dynamics of your movies, music and games.

This Wide Range Amplifier Technology (WRAT) is at the core of Onkyo's signature sound. The innovative amplifier design is comprised of three key elements: 
(1) a low negative feedback design for punchy, true-to-life sound, and cleaner audio across the frequency ranges; 
(2) closed groundloop circuits to reduce individual circuit noise and keep the ground potential free of distortion; and 
(3) a high instantaneous current to handle big dynamic gains. 

This allows massive power at 170 W/Ch (6 Ohms, 1 kHz, 0.9% THD, 1 Channel Driven, FTC) and 100 W/Ch (8 Ohms, 20 Hz–20 kHz, 0.08% THD, 2 Channels Driven, FTC).

384 kHz/32-bit Hi-Grade DAC

No matter what you're listening to, it will sound powerfully full, clean and clear. A premium-quality AK4458 digital-to-analog converter from Asahi Kasei implements unique low-distortion filtering technologies for clear sound, and unlocks the full potential of any audio format, including compressed, lossless, and hi-res audio (MP3, WMA, WMA Lossless, FLAC, WAV, OggVorbis, AAC, Apple Lossless, DSD 5.6 MHz, LPCM, and Dolby TrueHD). 

Classic Analog & Hi-Res Digital

This receiver is engineered for hi-res analog and digital audio. You can spin your classic vinyl and hear it in all its analog glory and stream your networked hi-res digital files. Both analog and digital audio sound its warmest and clearest. The TX-NR646 supports hi-res audio playback, gapless playback, and the ability to play DSD, Double DSD, FLAC and ALAC along with other Hi-Res formats.

Powered Zone 2 and Zone 2 Line-Outs

The TX-NR646 features Powered Zone 2 and Zone 2 line-outs. This lets you assign two channels to power audio in a room equipped with speakers. An existing hi-fi system in a third room can also be connected via the line-out, enabling the use of the A/V receiver as a pre-amp and audio server. 

2015 AccuEQ

AccuEQ conducts two measurements- one to set the level, distance and crossover for ALL speakers, including the subwoofer, and a second measurement to eliminate standing waves. Choose to include or bypass EQ measurement for front left and right speakers, and choose to automatically or manually set the EQ. Further, you can save your own manual EQ settings into three available presets. 

Amplifier

• # Channels : 7.2
• Power Watts/Ch (6 Ohms 1kHz, 1 Channel Driven, FTC) : 170, 0.9% THD
• Power Watts/Ch (8 Ohms 20-20kHz, 2 Channels Driven, FTC) : 100, 0.08% THD
• WRAT (Wide Range Amplifier Technology) : YES
• H.C.P.S. (High Current Power Supply) : YES (Massive High Power Transformer)
• THX Certified : NO
• Continuous 6 Ohms Rated : YES
• Certified 4 Ohms Performance : NO
• Discrete Output Stage Circuitry : YES
• 3-Stage Inverted Darlington Circuitry : NO
• PUSH-PULL Design : YES
• Independent Block Construction (Amp/Preprocessor) : NO
• High-Grade Toroidal Transformer : NO
• Independent Power Supply : YES (x2)
• Bi-amp Capability For Front : YES

Processing

• Dolby Atmos : YES
• 32-Bit Digital Signal Processing Engine : YES
• Dolby Decoder : Atmos, True HD, DD Plus
• DTS:X : YES
• DTS Decoder : DTS: X, DTS-HD Master Audio
• ONKYO GAME Surround Modes : YES (Rock, Sports, Action, RPG)
• VLSC for Noiseless Audio Processing : NO
• THX Processing Mode : NO
• AccuEQ Room Calibration : YES (Advanced)
• Phase-Matching Bass Boost : YES (for Deep Bass and Clear Mid-Range)
• Direct/Pure Mode : YES / -
• Pure Direct Analog Path Mode : NO
• Advanced Music Optimizer : YES (Bluetooth Included)
• 384K/32 Bit DACs : YES (Asahi Kasei AKM4458)
• 192K/32 Bit DACs : NO
• 192K/24 Bit DACs : NO
• isf Certified Calibration Control : NO

Connectivity

• Audio I/O : 7 / 0
• Phono Input : YES
• Digital Audio IN (OPT/COAX) : 2 / 1
• Composite Video I/O : 3 / 0
• Component Video I/O : 2 / 0
• Front Panel HDMI : YES
• Front-Panel A/V : NO
• Front-Panel Optical : NO
• USB Input : YES (Rear)
• HDMI I/O : 8 / 2
• HDMI 4K/60 Hz- Capable HDMI Terminals : YES (HDR Support)
• HDCP 2.2 Copy-Protection Compatibility : YES (3 in / 2 out)
• HDMI Support for High Dynamic Range : YES
• HDMI Support for 3D, Audio Return Channel and CEC : YES
• BT.2020 Support : YES
• HDMI Support for Deep Color, x.v.Color, LipSync : YES
• HDMI Support for DVD-Audio, SACD, Multichannel PCM : YES
• InstaPrevue Input Source Prevue : NO
• MHL for Mobile Device Connection : NO
• Composite to Component Video Upconversion : NO
• Analog To HDMI Upconversion : YES (from 480i/576i)
• 1080p Upscaling : NO
• 4K (up to 4096 x 2160) Upscaling : NO
• 4K Passthrough : YES
• Analog Pre-Outs : Subwoofer (x2)
• XLR Pre-outs : NO
• 18mm Pitch High Grade Pre-outs : NO
• Speaker A/+B : NO
• Powered Zone 2 : YES
• Powered Zone 3 : NO
• Zone 2 Line Out : YES (Fixed)
• Zone 2 Video Out : NO
• Zone 2 Digital to Analog Audio Conversion : YES (S/PDIF, NET, USB)
• Zone 3 Line Out : NO
• Whole House Mode : NO
• Made for iPod, iPhone, iPad : YES
• Airplay : YES
• Supports Onkyo Remote App : YES (iPod touch/iPhone and Android-Powered Devices)
• Internet Radio Capable : YES (Pandora, Spotify, Sirius, Slacker, TuneIn, Deezer)
• Spotify Connect Support : YES
• Streaming Audio From PC / Network : YES (DLNA, Home Media)
• Hi-Res Streaming Audio Formats : YES (Apple Lossless, DSD 2.8/5.6 MHz, Dolby TrueHD, FLAC 192/24, LPCM, Ogg Vorbis, WAV, WMA)
• Streaming Audio From USB memory : YES
• Wireless Network : YES (Wi-Fi-Certified)
• Bluetooth : YES (Built-in)
• PC Input (15 pin D-sub) : NO

Integration Access

• RS-232 : NO
• IR Input : NO
• IR Output : NO
• Ethernet : YES
• ONKYO-RI System Control : YES
• RIHD (Remote Interactive Over HDMI) : YES
• 12V Trigger : NO

Miscellaneous

• Pre-Pro/Learning Remote : YES / -
• On Screen Remote Programming : YES
• Hybrid Standby Function : YES (to Reduce Power Consumption)
• Smart Grid-Ready : YES
• Auto Speaker Calibration W/Mic. : YES (AccuEQ - Advanced)
• OSD Out : YES (Advanced "Home" GUI)
• Solid Aluminum Front : NO
• Transparent High-Grade Speaker Terminals : NO
• Detachable AC Cord : NO
• Warranty : 2 YEARS

Power Output

• All Channels : 170 W/Ch (6 Ohms, 1 kHz, 0.9% THD, 1 Channel Driven, FTC);
  100 W/Ch (8 Ohms, 20 Hz–20 kHz, 0.08% THD, 2 Channels Driven, FTC)
• Dynamic Power : 240 W (3 Ohms, Front)
  210 W (4 Ohms, Front)
  120 W (8 Ohms, Front)
• THD+N (Total Harmonic Distortion + Noise) : 0.08% (20 Hz-20 kHz, Half power)
• Damping Factor : 60 (Front, 1 kHz, 8 Ohms)
• Input Sensitivity and Impedance : 200 mV/47 k-ohms (Line)
  3.5 mV/47 k-ohms (Phono MM)
• Rated RCA Output Level and Impedance : 100 mV/2.2 k-ohms (Zone 2 Line Out)
  200 mV/470 Ohms (Subwoofer Pre Out)
• Maximum RCA Output Level and Impedance : 1.0 V/2.2 k-ohms (Zone 2 Line Out)
  2.0 V/470 Ohms (Subwoofer Pre Out)
• Phono Overload : 70 mV (MM, 1 kHz, 0.5%)
• Frequency Response : 10 Hz-100 kHz/+1 dB, -3 dB (Direct Mode)
• Tone Control : ±10 dB, 20 Hz (Bass)
  ±10 dB, 20 kHz (Treble)
• Signal-to-Noise Ratio : 100 dB (Line, IHF-A)
  80 dB (Phono MM, IHF-A)
• Speaker Impedance : 6 Ohms–16 Ohms

Video Section

• Input Sensitivity/Output Level and Impedance
• Video : 1.0 Vp-p/75 Ohms (Component)
  0.7 Vp-p/75 Ohms (Component PB/CB, PR/CR)
  1.0 Vp-p/75 Ohms (Composite)
• Component Video Frequency Response : 5 Hz–13.5 MHz/+0 dB, -3dB

Tuner Section

• Tuning Frequency Range
• FM : 87.5 MHz–107.9 MHz
• AM : 530 kHz–1,710 kHz
• FM/AM Preset Memory : 40 stations

General

• Power Supply : AC 120 V~, 60 Hz
• Power Consumption : 6.4 A
• No-Sound Power Consumption : 70 W
• Standby Power Consumption : 0.1 W
• Dimensions (W x H x D) : 17 1/8" x 6 13/16" x 12 15/16" (435 x 173.5 x 329 mm)
• Weight : 20.7 lbs (9.4 kg)

UPC Code

• (B) : 751398012228