Onkyo TX-NR737 (European version)

Onkyo TX-NR737 was introduced in 2014. It is equipped with 7 channel amplifier and is capable of 7.1 maximum channel processing.

We evaluated the Receiver and gave 48 overall score out of 100. Our ranking system is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

Amplifier score is based on power ratings, minimum impedance load, power supply, transformer type, total harmonic distortion, damping factor, signal to noise ratio and other small details. Audio score depends on the number of channels, front wide channel support, maximum channel processing, support of audio formats, DAC specifications, room calibration algorithm... Video score is based on HDR, Dolby Vision and video signal passthrough and upscaling, analog to HDMI upconversion. Connectivity score is defined from all wired and wireless inputs and outputs, internet and bluetooth connections, HEOS, SONOS and others. Multizone score depends on the number of zones with their outputs. Radio score is evaluated form digital radio support and analog tuner with its frequency range, signal to noise ratio, harmonic distortion...

In this section we present pros and cons of Onkyo TX-NR737.

Here we are comparing Onkyo TX-NR737 to its predecessor TX-NR727 and displaying the major changes.

UPGRADES	Onkyo TX-NR737	Onkyo TX-NR727
Dolby Atmos	✔ up to with firmware update	✖
Gapless Playback	✔	✖
Video Signal Passthrough	up to 4K/60p (YCbCr 4:2:0)	up to 4K/30p

DOWNGRADES	Onkyo TX-NR737	Onkyo TX-NR727
High Resolution Music Playback via USB	✔ up to 96 kHz	✔ up to 192 kHz
Audyssey Dynamic EQ	✖	✔
Audyssey Dynamic Volume	✖	✔
Audyssey DSX	✖	✔
Less HDMI Inputs	7 (1 front)	8 (1 front)
Less Composite Video Inputs	3	4

For more detailed comparison between the models please visit Onkyo TX-NR737 vs Onkyo TX-NR727.

Amplifier

Onkyo TX-NR737 has 7 channel amplifier and delivers 110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and also has a stable performance at 4 Ω load.

Video Features

The Receiver has 4K passthrough up to 60p and 4K upscaling up to 30p.

Dolby Atmos and Dolby Surround upmixer

Onkyo TX-NR737 supports Dolby Atmos. It can be configured upto 5.1.2 channels using internal amplifiers.

Dolby Atmos is the first cinematic audio format in which sounds exist as individual entities, called audio objects. In Dolby Atmos, any sound - the helicopter, a car screeching around a corner, a melodic bird call - can exist as an independent audio object, free of channel restrictions. They can be precisely placed and moved anywhere in your room, including overhead, to flow above and around you in three-dimensional space. Through the use of audio objects, overhead sound, and all the richness, clarity, and power of Dolby sound, Dolby Atmos turns your room into an amazing place for entertainment. You'll feel like you're inside the action, in ways you've never experienced before.

Dolby Atmos for the home represents every sound in the original cinema mix as an audio object. Extensions to the Dolby Audio™ codecs, along with an advanced scalable algorithm, allow Dolby Atmos to be delivered via Blu-ray Disc and streaming media. A spatially-coded substream is added to Dolby TrueHD or Dolby Digital Plus. A Dolby Atmos audio/video receiver (AVR) adapts the cinema experience to your home theater from seven speakers to as many as 34 in 24.1.10 configuration, recreating the original artistic concept. The format supports up to 128 simultaneous independent audio objects in a mix for rich, realistic, and breathtaking sound. It recreates the director's original concept through descriptive metadata to provide customized playback for home theater and delivers sounds above you through overhead speakers, special upward-firing Dolby Atmos speakers, or a Dolby Atmos enabled sound bar.

If the content is not mixed in Dolby Atmos then the Dolby surround upmixer will expand the audio to all channels including ceiling speakers. The upmixer has replaced the Dolby Pro Logic II family with improved upmixing algorithms.

WRAT

Onkyo TX-NR737 features Onkyo’s Wide Range Amp Technology (WRAT) circuit layout that prevents phase shifting by pushing the roll-off point higher than the listening-level frequency. Amplifying sound without phase shift creates an uncommonly well-focused and realistic audio image. If phase shift occurs and signal timing is not accurate, then neither is the resulting audio image.

THX™ Certification

Onkyo TX-NR737 is THX™ certified which offers optimal performance, superior quality and seamless integration. THX works with partners from the ground up, so that certified products deliver professional quality audio-visual experiences right out of the box. They only certify the very best products with uncompromised quality, performance and consistency. They ensure that THX certified devices play well with lower performing devices and components. THX listening modes make the receiver to have one speaker set up for movies, music and games. They are tested for power output, bass management, signal-to-noise ratio and feature RE-EQ, timbre matching, boundary gain compensation and THX Loudness Plus. The current model has Select™2 Plus class performance. This means that it is ideally suited for a room where the screen-to-seat viewing distance is approximately 3 to 4 meters, and the room size is approximately 56 cubic meters.

Advanced Music Optimizer

Compressed music enhancement in Onkyo TX-NR737 is done by Onkyo’s Advanced Music Optimizer. While MP3 or AAC files may sound fine through the headphones of your portable digital player, the limitations of these files can be exposed when played back through a quality home entertainment system. This is because a significant amount of high-frequency bit information is lost during the file-compression process. To counter this, Onkyo has designed the Advanced Music Optimizer to compensate for lost bit information and improve the quality of compressed audio signals. This results in a clearer and more expansive sound. Also included in this technology is a loudness correction feature that further improves the audio character of compressed files.

Phase-Matching Bass Boost

Onkyo TX-NR737 features Phase-Matching Bass Boost. The negative effects of phase-shift or the timing difference between sound waves of different frequencies can sometimes be heard in audio players when corners are cut in order to increase bass response. While most audio systems have some form of low-frequency enhancement system, often a bigger bass sound comes at the expense of mid-range clarity, and results in a smeared or muddy sound. Onkyo’s Phase-Matching Bass Boost technology avoids this problem by improving the phase timing to preserve the natural clarity of the mid-range allowing vocals and strings to shine while maintaining a smooth, powerful bass response at all volume levels.

Room Correction

Onkyo TX-NR737 comes with AccuEQ room correction system and includes the calibration microphone.

Connectivity

Onkyo TX-NR737 can be connected to internet using ethernet cable or built-in wi-fi adapter. It can also connect to bluetooth devices via built-in bluetooth adapter. The Receiver supports AirPlay via optional Onkyo RI Dock DS-A5 (sold separately). It has 7 HDMI inputs and HDCP 2.2 copy protection. There is a phono input with built-in phono stage for connecting the cartridge output of the turntable directly to the Receiver.

Front panel has HDMI/MHL and USB inputs.

Here we list all the available features and specifications of Onkyo TX-NR737.

BASICS
Brand	Onkyo
Model	TX-NR737
Type	A/V Receiver
Country	Europe
Release Year	2014

AMPLIFIER
Channels	7.2
Front Wide Channel Support	✖
WRAT (Wide Range Amplifier Technology)	✔
VLSC (Vector Linear Shaping Circuitry)	✖
Optimum Gain Volume Circuitry	✔
THX™ Certification	✔ Select™2 Plus
Continuous 6 Ω Rated	✔
Certified 4 Ω Performance	✔
Discrete Output Stage Circuitry	✔
3-Stage Inverted Darlington Circuitry	✔ All Channels
PUSH-PULL Design	✖
Independent Block Construction (Amp/Preprocessor)	✖
Bi-amp Capability	✔
BTL (Bridged Transless or Bridging)	✖

AUDIO
Digital Signal Processing (DSP) Engine	Dual 32-bit DSP for Powerful Advanced Processing
DAC	Burr-Brown
Maximum Channel Processing	7.1
Air Studios Monitor Certification	✖
Dolby Atmos	✔ up to with firmware update
Dolby Atmos Height Virtualization	✖
Dolby TrueHD	✔
Dolby Digital Plus	✔
Dolby Surround Upmixer	✖
Dolby Pro Logic	✔ PLIIz
Surround EX	✔ also known as Dolby Digital Surround EX
DTS:X	✖
DTS Neural:X	✖
DTS Virtual:X	✖
DTS Neo	✔ Neo:6
DTS-HD Master Audio	✔
DTS-HD High Resolution Audio	✔
DTS 96/24	✔
DTS Express	✔
DTS-ES	✔ Discrete 6.1, Matrix 6.1
IMAX Enhanced	✖
Auro 3D with Auro-Matic Upmixer	✖
PCM	✔ 2-ch/Multi-ch Input
Music Playback via USB	FLAC, WAV, Apple Lossless, WMA, WMA Lossless, Ogg, MP3, DSD, AAC, LPCM, Dolby TruHD
High Resolution Music Playback via USB and/or Network	✔ up to 96 kHz
High Resolution Audio Formats via USB	FLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC
Multi-Channel Music File Playback via USB	✖
Gapless Playback	✔
DSD via HDMI	✔ 2-ch/Multi-ch Input
DSD via USB	✔ 2-ch Input
DSD to PCM Converter	✖
USB DAC	✖
Jitter Reduction	✔ PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
DTS Dialogue Control	✖
Dialog Enhancement	✖
Dialog Level Adjustment	✖
Dialog Normalization	✔
Dialogue Lift	✖
Tone Control	✔ Front L/R Channels
Compressed Music Enhancer	✔ Advanced Music Optimizer (bluetooth included)
High-resolution Music Enhancer	✖
THX Processing Mode	✔
Audyssey Dynamic EQ	✖
Audyssey Dynamic Volume	✖
Audyssey LFC	✖
Audyssey Sub EQ HT	✖
Audyssey DSX	✖
Phase-Matching Bass Boost	✔ for Deep Bass and Clear Mid-Range
Direct Mode	✔
Pure Audio Mode	✔
Pure Direct Analog Path Mode	✖
Virtual Speakers	✔ T-D (Theater-Dimensional)
Independent Dual Subwoofer Output	✖

CALIBRATION
Auto Speaker Calibration System with Mic.	✔ AccuEQ

VIDEO
HDR10	✖
HDR10+	✖
Dynamic HDR	✖
BT.2020 color space	✖
Dolby Vision	✖
Hybrid Log Gamma (HLG)	✖
Quick Media Switching (QMS)	✖
Auto Low Latency Mode (ALLM)	✖
Variable Refresh Rate (VRR)	✖
Quick Frame Transport (QFT)	✖
3-D Ready	✔
Video Signal Passthrough	up to 4K/60p (YCbCr 4:2:0)
Video Signal Upscaling	✔ up to 4K/30p (Marvell Qdeo)
Analog To HDMI Upconversion	✔ Component**, Composite
Component Video Upscaling	✖
Analog to Analog Video conversion	✖
Component Video Maximum Resolution	1080i
isf Certified Calibration Control	✖

CONNECTIVITY
MHL Input	✔ Front HDMI
DLNA 1.5	✔
FireConnect	✖
FlareConnect	✖
Chromecast Built-In	✖
DTS Play-Fi	✖
Works with Amazon Alexa	✖
Works with SONOS	✖
AirPlay	✔ AirPlay via optional Onkyo RI Dock DS-A5 (sold separately)
Apple Product Connection	✔ iPod and iPhone via optional Onkyo RI Dock DS-A5 (sold separately)
Remote App	Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices
InstaPrevue Input Source Prevue	✔
Ethernet	✔
Ethernet Switch	✖
Wi-Fi	✔
Bluetooth	✔
HDBaseT Compatible	✖
Enhanced Audio Return Channel (eARC)	✖
HDCP Version	2.2
HDMI Inputs	7 (1 front)
HDMI Outputs	2 (simultaneous)
USB Input	1 (Front)
USB DC Out Port	✖
Analog Audio Line Inputs	6
Analog Audio Line Outputs	✖
Phono Input	✔
Optical Inputs	1
Optical Outputs	✖
Coaxial Inputs/Outputs	2 / No
Composite Video Inputs	3
Composite Video Outputs	1
S-Video Inputs	✖
S-Video Outputs	✖
Component Video Inputs	1
Component Video Outputs	1
PC In	✖
Multi-Channel Input	✖
Analog Pre-Outs	0.2
XLR Inputs	✖
XLR Pre-outs	✖
Front A/V Inputs	HDMI/MHL, USB
Speaker A/B	✖
Headphone Out	✔ 6.3 mm

ZONES
Zones	3
Powered Zones	✔ 2
Zone 2 Outs	RCA Line Out
Zone 3 Outs	RCA Line Out
Whole House Mode	✔
RS-232 Interface	✖
+12V Trigger Output	0
Remote (IR) Input/Output	0 / 0

MISC
On-Screen Display	✔ Advanced "Home" GUI
Detachable Power Cord	✔
uport	✖
ONKYO-RI System Control	✔
RIHD (Remote Interactive Over HDMI)	✔
Pre-Pro/Learning Remote	No / ✔
On Screen Remote Programming	✔
Bi-directional Remote Setup via GUI	✖
Activity Based Remote	✖
Smart Grid-Ready	✔

RADIO
Analog Tuner	✔ FM/AM with RDS
Presets	40
Digital Radio	✖
Internet Radio	✔ TuneIn
Pandora	✔
Spotify	✔
Tidal	✖
Deezer	✖
Napster	✖
SiriusXM Internet Radio	✖

CONSTRUCTION
Solid Aluminum Front	✖
Speaker Terminals	9
Large Speaker Terminals	9
Color-Coded Speaker Terminals	✔
Transparent High-Grade Speaker Terminals	✖
18mm Pitch High Grade Pre-outs	✖
19mm-Pitch Audio Inputs	✖
Gold plated RCA terminals	✖

POWER
Power Supply	AC 220-240 V, 50/60 Hz
Independent Power Supply	2
H.C.P.S. (High Current Power Supply)	✔ Massive High Power Transformer
Toroidal Transformer	✖
Power Consumption	690 W
No Sound Power	85 W
Standby Power	0.2 W
Capacitor Bank	10,000 µF

GENERAL
ECO Mode / Hybrid Standby Function	✔
Dimensions (W x H x D)	435 mm x 175 mm x 379 mm 17-1/8" x 6-7/8" x 14-15/16"
Weight	11.5 kg (25.4 lbs)
Warranty	2 Years

SPECS
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	110 W (0.08% THD)
Power Output (6 Ω, 1 kHz, 2 channel driven, FTC)	125 W (0.7% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)	185 W
Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)	170 W (1% THD)
Dynamic Power per Channel (3 Ω, Front)	250 W
Dynamic Power per Channel (4 Ω, Front)	220 W
Dynamic Power per Channel (8 Ω, Front)	130 W
THD	0.08% (20 Hz - 20 kHz, Half power)
Damping Factor	60 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance (Line)	200 mV/47 kΩ (Line)
Input Sensitivity and Impedance (Phono MM)	2.5 mV/47 kΩ
Rated Preout Level and Impedance	200 mV/470 Ω
Maximum Lineout Level and Impedance	2 V/2.2 kΩ
Phono Overload	70 mV (MM, 1kHz, 0.5% Direct)
S/N Ratio (Line, IHF-A)	106 dB
S/N Ratio (Phono MM, IHF-A)	80 dB
Frequency Response (Analog In)	5 Hz - 100 kHz/+1 dB, -3 dB (Direct Mode)
DSD Sampling Rates via HDMI	2.8 MHz, 5.6 MHz
DSD Sampling Rates via USB	2.8 MHz
Video Input Sensitivity/Output Level and Impedance	1 Vp-p/75 Ω (Component Y) 0.7 Vp-p/75 Ω (Component PB/CB, PR/CR) 1 Vp-p/75 Ω (Composite)
Video Frequency Response	5 Hz - 100 MHz/+0 dB, -3 dB (Component)
Ethernet Standard	10BASE-T/100BASE-TX
Wi-Fi Standard	IEEE 802.11 b/g/n
Wi-Fi Terminal Frequency	2.4 GHz
Bluetooth Version	2.1 + EDR
Bluetooth Frequency	2.4 GHz
FM Frequency	87.5 MHz - 108.0 MHz
AM Frequency	522/530 kHz - 1611/1710 kHz

* - 480i/576i and 480p/576p only
** - 480i/576i only
*** - no 1080p/24 upconversion
**** - 1080p signal is not converted

In 2015 Onkyo TX-NR737 was replaced by TX-NR747. Let us now have a look at some important changes that the successor brought.

UPGRADES	Onkyo TX-NR747	Onkyo TX-NR737
Dolby Surround Upmixer	✔	✖
DTS:X	✔ up to 5.1.2 after firmware update	✖
DTS Dialog Control	✔	✖
More Advanced Auto Speaker Calibration System	✔ Advanced AccuEQ	✔ AccuEQ
HDR10	✔	✖
AirPlay	✔ AirPlay	✔ AirPlay via optional Onkyo RI Dock DS-A5 (sold separately)
More HDMI Inputs	8 (1 front)	7 (1 front)
More Analog Audio Line Inputs	7	6
More Analog Audio Line Outputs	1	✖
More Optical Inputs	2	1
More Component Video Inputs	2	1
Deezer	✔	✖
Bigger Power Supply	710 W	690 W

DOWNGRADES	Onkyo TX-NR747	Onkyo TX-NR737
Video Signal Upscaling	✖	✔ up to 4K/30p (Marvell Qdeo)
MHL Input	✖	✔ Front HDMI
Less Coaxial Inputs/Outputs	1 / No	2 / No
Less Composite Video Outputs	✖	1
Less Component Video Outputs	✖	1
Less Zones	2	3

For more detailed comparison between the models please visit Onkyo TX-NR747 vs Onkyo TX-NR737.