Onkyo TX-SR373

Onkyo TX-SR373 was introduced in 2017. It is equipped with 5 channel amplifier with 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) power per channel and is capable of 5.1 maximum channel processing. It passes 4K/60Hz video signal.

We evaluated the a/v receiver and gave 70 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.

For more details about the ranking please go to    Evaluation section.

Here is a history of the series, where you can view and compare the main specifications of the receivers.

You can view their side-by-side comparison here: Onkyo TX-SR393 vs TX-SR383 vs TX-SR373 vs TX-SR353 vs TX-SR343 vs TX-SR333.

In this section we present pros and cons of Onkyo TX-SR373.

In 2017 Onkyo released 9 new receivers. Here is the lineup:

You can view their side-by-side comparison here: Onkyo TX-RZ920 vs TX-RZ820 vs TX-RZ720 vs TX-RZ620 vs TX-NR777 vs TX-NR676E.

Onkyo TX-SR373 has replaced TX-SR353. Here we present differences between these two models.

UPGRADES	Onkyo TX-SR373	vs	Onkyo TX-SR353
Dolby Vision		vs
Analog Tuner	FM/AM with RDS	vs	FM/AM
Bigger Power Supply	220 W	vs	210 W
Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	100 W (0.09% THD)	vs	80 W (0.08% THD)
Higher S/N Ratio (Line, IHF-A)	106 dB	vs	98 dB

For more detailed comparison between the models please visit Onkyo TX-SR373 vs TX-SR353.

Onkyo TX-SR373's 5 channel amplifier can be assigned for different speaker configurations.

• Configurations: Available configurations are:
5.1 with internal amplifier.

Onkyo TX-SR373 features 4 HDMI inputs. It has 1 output.

• 4K/60Hz Passthrough: All inputs pass up to 4K/60p (4:4:4) video signal.
• BT.2020 Color Space: BT.2020 or Rec. 2020 is a color standard which delivers a wider color gamut compared to Rec. 709. It covers approximately 75% of the total visual spectrum while the Rec. 709 covers only 35%.
• HDCP 2.2 Copy Protection: All inputs and outputs are HDCP 2.2 compliant which is a requirement for 4K/HDR copy-protected content transmission.
• 3D Ready: Onkyo TX-SR373 is able to pass 3D video through HDMI.

HDR (High Dynamic Range)

Onkyo TX-SR373 supports HDR (high dynamic range) video formats such as HDR10 and Dolby Vision via HDMI ports. High dynamic range video has greater dynamic range than standard dynamic range (SDR) video with brighter whites and deeper blacks. The result is greater contrast and more details in dark and bright areas, better color and depth.

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.2
QMS (Quick Media Switching)
ALLM (Auto Low Latency Mode)
VRR (Variable Refresh Rate)
QFT (Quick Frame transport)
3-D Ready
Video Signal Passthrough	up to 4K/60p (4:4:4)
Video Signal Upscaling

Onkyo TX-SR373 comes with AccuEQ room correction system and includes the calibration microphone.

• AccuEQ: First, AccuEQ detects the presence of speakers and evaluates the impedance of each. Next, it pinpoints their distance relative to the main listening position using the mic and sets suitable sound-pressure levels. Then it selects the optimal crossover frequency so that deeper bass rolls smoothly off to the subwoofer. Finally, AccuEQ performs frequency response equalization based on room-acoustic and speaker data collected via microphone. The sound-field is now tailored around the listening position, resulting in a more immersive and realistic in-film experience.

Audio

• Analog Line Inputs: There are 3 line inputs for analog audio connection.
• Digital Inputs: 1 optical input and 1 coaxial input are available for digital audio connection.
• Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel.

Video

• HDMI:
Inputs: 4   Outputs: 1
8K Inputs: 0
• Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
Inputs: 2   Outputs: 1

Front A/V Inputs

• USB

In 2018 Onkyo TX-SR373 was replaced by Onkyo TX-SR383. Let us now have a look at some important differences between Onkyo TX-SR373 and its successor.

UPGRADES	Onkyo TX-SR383	vs	Onkyo TX-SR373
More Channels	7.2	vs	5.1
More Channel Processing	7.1	vs	5.1
Dolby Atmos		vs
Dolby Surround Upmixer		vs
DTS:X		vs
DTS Neural:X		vs
DTS Express		vs
DTS-ES		vs
More Zones	2	vs	1
More Speaker Terminals	7	vs	5
Bigger Power Supply	270 W	vs	220 W
Wider AM Frequency Range	530 kHz - 1710 kHz	vs	530 kHz - 1700 kHz

DOWNGRADES	Onkyo TX-SR383	vs	Onkyo TX-SR373
Dolby Pro Logic		vs	PLII
DTS Neo		vs	Neo:6
Analog Tuner	FM/AM	vs	FM/AM with RDS
Lower Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	80 W (0.08% THD)	vs	100 W (0.09% THD)

For more detailed comparison between the models please visit Onkyo TX-SR373 vs TX-SR383.

GENERAL
Brand	Onkyo
Model	TX-SR373
Type	A/V Receiver
Country	Europe
Release Year	2017
Predecessor	Onkyo TX-SR353
Successor	Onkyo TX-SR383

AMPLIFIER
Channels	5.1
Power Output	80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
Front Wide Channel Support
Dynamic Audio Amplification
Non-Phase Shift Amplifier
VLSC (Vector Linear Shaping Circuitry)
Optimum Gain Volume Circuitry
THX™ Certification
Continuous 6 Ω Rated
Certified 4 Ω Performance
Discrete Output Stage Circuitry
Independent Block Construction (Amp/Preprocessor)
Bi-amp Capability
BTL (Bridged Transless or Bridging)

AUDIO FEATURES
DAC Specs	192 kHz/24 Bit
Maximum Channel Processing	5.1
Air Studios Monitor Certification
Dolby Atmos
Dolby Atmos Height Virtualization
Dolby Atmos Music
Dolby TrueHD
Dolby Digital Plus
Dolby Surround Upmixer
Dolby Pro Logic	PLII
Dolby Digital EX
THX Listening Modes
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
IMAX Enhanced
Auro 3D with Auro-Matic Upmixer
PCM	2-ch/Multi-ch Input
Music Playback via USB	WMA, MP3, AAC
High Resolution Music Playback via USB and/or Network
DSD via HDMI	2-ch
DSD via USB
DSD to PCM Converter
USB DAC
Jitter Reduction
DTS Dialogue Control
Dialog Enhancement
Dialog normalization
Dialogue Lift
Tone Control	Front L/R Channels
Compressed Music Enhancer	Advanced Music Optimizer
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
Direct Mode
Pure Audio Mode
Pure Direct Analog Path Mode
Virtual Speakers

CALIBRATION
Auto Speaker Calibration System with Mic.	AccuEQ

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.2
QMS (Quick Media Switching)
ALLM (Auto Low Latency Mode)
VRR (Variable Refresh Rate)
QFT (Quick Frame transport)
3-D Ready
Video Signal Passthrough	up to 4K/60p (4:4:4)
Video Signal Upscaling
Analog To HDMI Upconversion
isf Certified Calibration Control

CONNECTIVITY
Wi-Fi
Bluetooth	SBC, AAC
Works with Amazon Alexa
Chromecast Built-In
Works with SonoS
DTS Play-Fi
MHL Input
DLNA 1.5
AirPlay
Apple Product Connection
Remote App
InstaPrevue Input Source Prevue

TERMINALS
HDMI Inputs	4
HDMI Outputs	1
8K Inputs
USB Input	1 (Front)
USB DC Out Port
Optical Inputs	1
Optical Outputs
Coaxial Inputs	1
RCA Line Inputs	3
RCA Line Outputs
XLR Line Inputs
Phono Input
Multi-Channel Input
RCA Pre-Outs	0.1
XLR Pre-outs
Composite Video Inputs	2
Composite Video Outputs	1
S-Video Inputs
S-Video Outputs
Component Video Inputs
Component Video Outputs
Ethernet
Ethernet Switch
PC In
Front A/V Inputs	USB
Speaker A/B
Headphone Out	6.3 mm (1/4")
Detachable Power Cord
uport

ZONES
Number of Zones	1
Whole House Mode
RS-232C Interface
+12V Trigger Output	0
Remote (IR) Input/Output	0 / 0

MISCELLANEOUS
On-Screen Display	via HDMI
ONKYO-RI System Control
RIHD (Remote Interactive Over HDMI)
Pre-Pro/Learning Remote	/
On Screen Remote Programming
Bi-directional Remote Setup via GUI

RADIO
Analog Tuner	FM/AM with RDS
Presets	30
Digital Radio
Internet Radio
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM

CONSTRUCTION
Solid Aluminum Front
Speaker Terminals	5
Large Speaker Terminals	2
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
Gold plated RCA terminals

POWER
Power Supply	AC 220-240 V, 50/60 Hz
Independent Power Supply
H.C.P.S. (High Current Power Supply)
Toroidal Transformer
Power Consumption	220 W
Standby Power	0.3 W

PHYSICAL
Dimensions (W x H x D)	435 mm x 168 mm x 326.5 mm 17-1/8" x 6-5/8" x 12-13/16"
Weight	8.0 kg (17 lb 10 oz)

SPECIFICATIONS
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	100 W (0.09% THD)
Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)	135 W (1% THD)
THD	0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)
Input Sensitivity and Impedance (Line)	200 mV/47 kΩ
S/N Ratio (Line, IHF-A)	106 dB
Frequency Response (Analog In)	5 Hz - 100 kHz/0 dB, -3 dB (Direct)
DSD Sampling Rates via HDMI	2.8 MHz
Video Input Sensitivity/Output Level and Impedance	1 Vp-p/75 Ω (Composite)
Bluetooth Version	3.0
Bluetooth Frequency	2.4 GHz
HDMI Terminal	Type A (19-pin)
HDMI Output Type	5 V, 55 mA
USB Terminal	5 V, 0.5 A
FM Frequency	87.5 MHz - 108.0 MHz
AM Frequency	530 kHz - 1700 kHz
Warranty	2 Years

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