Onkyo TX-SR373 vs Onkyo TX-SR353 Detailed Comparison
image not found

Disclosure: We earn money from the affiliate links to products associated with content in this article.


Here we are comparing Onkyo TX-SR373 to Onkyo TX-SR353 to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. The Onkyo TX-SR373 has 5 channel and the Onkyo TX-SR353 has 5 channel and equally powerful amplifiers.

Let us have a look at some highlights of the models.

Onkyo TX-SR373 Highlights

Onkyo TX-SR353 Highlights

  • 5.2 channels
  • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • HDR10, Dolby Vision, 4K Passthrough
  • Bluetooth
  • USB input
  • 5.1 channels
  • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • HDR10, 4K Passthrough
  • Bluetooth
  • USB input

We have evaluated both receivers. Onkyo TX-SR373 gets higher overall score in our ranking system which is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

Onkyo TX-SR373

Onkyo TX-SR353


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 4K passthrough, 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...

Advantage of Onkyo TX-SR373

This section shows those features and specifications which are the reason to choose Onkyo TX-SR373 over Onkyo TX-SR353.

Onkyo TX-SR373 has more channels and higher signal to noise ratio. In video department only Onkyo TX-SR373 supports Dolby Vision.

Onkyo TX-SR373 Onkyo TX-SR353
More Channels 5.2 5.1
Dolby Vision βœ” βœ–
Higher S/N Ratio (Line, IHF-A) 106 dB 98 dB

Common Strengths and Weaknesses

Here we list common strengths and weaknesses of both receivers.

Dolby TrueHD πŸ‘
Dolby Digital Plus πŸ‘
DTS-HD Master Audio πŸ‘
DTS-HD High Resolution Audio πŸ‘
DTS 96/24 πŸ‘
DSD via HDMI πŸ‘
Compressed Music Enhancer πŸ‘
Auto Speaker Calibration System with Mic. πŸ‘
HDR10 πŸ‘
BT.2020 color space πŸ‘
3-D Ready πŸ‘
4K or 8K Video Passthrough πŸ‘
Bluetooth πŸ‘
New HDCP Version πŸ‘
USB Input πŸ‘
Composite Video Inputs πŸ‘
Composite Video Outputs πŸ‘
Zones πŸ‘
Analog Tuner πŸ‘
Not Certified 4 Ω Performance πŸ‘Ž
No Bi-amp Capability πŸ‘Ž
Few Channel Processing πŸ‘Ž
No Dolby Atmos πŸ‘Ž
No Dolby Atmos Height Virtualization πŸ‘Ž
No Dolby Surround Upmixer πŸ‘Ž
No DTS Neural:X πŸ‘Ž
No DTS Virtual:X πŸ‘Ž
No IMAX Enhanced πŸ‘Ž
No Auro 3D with Auro-Matic Upmixer πŸ‘Ž
No High Resolution Music Playback via USB and/or Network πŸ‘Ž
No DTS Dialog Control πŸ‘Ž
No High-resolution Music Enhancer πŸ‘Ž
No HDR10+ πŸ‘Ž
No Hybrid Log Gamma (HLG) πŸ‘Ž
No 4K or 8K Video Upscaling πŸ‘Ž
No DLNA 1.5 πŸ‘Ž
No Chromecast Built-In πŸ‘Ž
Does not Work with Amazon Alexa πŸ‘Ž
Does Not Work with SONOS πŸ‘Ž
No Ethernet πŸ‘Ž
No Wi-Fi πŸ‘Ž
No eARC πŸ‘Ž
Few HDMI Inputs πŸ‘Ž
Few HDMI Outputs πŸ‘Ž
Few Analog Audio Line Inputs πŸ‘Ž
No Phono Input πŸ‘Ž
No Component Video Inputs πŸ‘Ž
No Multi-Channel Input πŸ‘Ž
No Analog Pre-Outs πŸ‘Ž
No Pandora πŸ‘Ž
No Spotify πŸ‘Ž
No Tidal πŸ‘Ž
No Deezer πŸ‘Ž
No Napster πŸ‘Ž
No SiriusXM Internet Radio πŸ‘Ž

Selected Features


Onkyo TX-SR373 has 5 channel and Onkyo TX-SR353 has 5 channel amplifiers. They both deliver 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) Since 2016 all receiver manufacturers have dropped front wide channel support. Onkyo TX-SR373 is no exception.

Video Features

Both receivers support 4K passthrough up to 60p. Onkyo TX-SR373 supports HDR10, Dolby Vision and Onkyo TX-SR353 supports HDR10.


High-dynamic-range (HDR) video has greater dynamic range than standard-dynamic-range (SDR) video with brigter whites and deeper blacks. HDR10 was announced on August 27, 2015, by the Consumer Technology Association and uses the wide-gamut Rec. 2020 color space. It sends static metadata via video stream to the TV which calibrates its screen brightness and color according to that. HDR10 supports up to 1000 nits of brightness and 10-bit color which corresponds to 1024 shades of the primary RGB colors.

Dolby Vision

Dolby Vision is an update to HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to 10,000 nits maximum brightness on a scene-by-scene or frame-by-frame basis and supports up to 12-bit color depth (4096 shades of RGB) and 8K resolution.

Advanced Music Optimizer

Compressed music enhancement in Onkyo TX-SR373 and Onkyo TX-SR353 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.


Onkyo TX-SR373

Onkyo TX-SR373 can also connect to bluetooth devices via built-in bluetooth adapter. It has 4 HDMI inputs with HDCP 2.2 copy protection.

Front panel has USB input.

Image cannot be found Image cannot be found

Onkyo TX-SR353

Onkyo TX-SR353 can also connect to bluetooth devices via built-in bluetooth adapter. It has 4 HDMI inputs with HDCP 2.2 copy protection.

Front panel has USB input.

Image cannot be found Image cannot be found

Detailed Specifications

And in the end let us list the detailed specifications of the receivers side-by-side.

Note: The following table shows only those details which are applicable for both models and excludes the ones that are applicable for only one model. If you want to see a full list of specs for each model please visit their individual pages here - Onkyo TX-SR373 and here - Onkyo TX-SR353.

BASICS Onkyo TX-SR373 Onkyo TX-SR353
TypeA/V ReceiverA/V Receiver
CountryNorth AmericaNorth America
Release Year20172016
AMPLIFIER Onkyo TX-SR373 Onkyo TX-SR353
Dynamic Audio Amplificationβœ– βœ–
Non-Phase Shift Amplifierβœ– βœ–
VLSC (Vector Linear Shaping Circuitry)βœ– βœ–
Optimum Gain Volume Circuitryβœ– βœ–
THXβ„’ Certificationβœ– βœ–
Continuous 6 Ω Ratedβœ” βœ”
Certified 4 Ω Performanceβœ– βœ–
Discrete Output Stage Circuitryβœ” βœ”
Independent Block Construction (Amp/Preprocessor)βœ– βœ–
Bi-amp Capabilityβœ– βœ–
BTL (Bridged Transless or Bridging)βœ– βœ–
AUDIO Onkyo TX-SR373 Onkyo TX-SR353
Maximum Channel Processing5.15.1
Air Studios Monitor Certificationβœ– βœ–
Dolby Atmosβœ– βœ–
Dolby Atmos Height Virtualizationβœ– βœ–
Dolby TrueHDβœ” βœ”
Dolby Digital Plusβœ” βœ”
Dolby Surround Upmixerβœ– βœ–
Dolby Digital EXβœ– βœ–
DTS:Xβœ– βœ–
DTS Neural:Xβœ– βœ–
DTS Virtual:Xβœ– βœ–
DTS-HD Master Audioβœ” βœ”
DTS-HD High Resolution Audioβœ” βœ”
DTS 96/24βœ” βœ”
IMAX Enhancedβœ– βœ–
Auro 3D with Auro-Matic Upmixerβœ– βœ–
PCMβœ” 2-ch/Multi-ch Inputβœ” 2-ch/Multi-ch Input
High Resolution Music Playback via USB and/or Networkβœ– βœ–
Multi-Channel Music File Playback via USBβœ– βœ–
DSD via HDMIβœ” 2-chβœ” 2-ch
USB DACβœ– βœ–
Jitter Reductionβœ– βœ–
DTS Dialog Controlβœ– βœ–
Dialog Enhancementβœ– βœ–
Dialog Normalizationβœ– βœ–
Dialogue Liftβœ– βœ–
Tone Controlβœ” Front L/R Channelsβœ” Front L/R Channels
Compressed Music Enhancerβœ” Advanced Music Optimizerβœ” Advanced Music Optimizer
High-resolution Music Enhancerβœ– βœ–
THX Processing Modeβœ– βœ–
Audyssey Dynamic EQβœ– βœ–
Audyssey Dynamic Volumeβœ– βœ–
Audyssey LFCβœ– βœ–
Audyssey Sub EQ HTβœ– βœ–
Audyssey DSXβœ– βœ–
Phase-Matching Bass Boostβœ– βœ–
Direct Modeβœ” βœ”
Pure Audio Modeβœ– βœ–
Pure Direct Analog Path Modeβœ– βœ–
Auto Speaker Calibration System with Mic.βœ” AccuEQβœ” AccuEQ
VIDEO Onkyo TX-SR373 Onkyo TX-SR353
HDR10βœ” βœ”
HDR10+βœ– βœ–
BT.2020 color spaceβœ” βœ”
Dolby Visionβœ” βœ–
Hybrid Log Gamma (HLG)βœ– βœ–
Quick Media Switching (QMS)βœ– βœ–
Auto Low Latency Mode Pass-throughβœ– βœ–
Variable Refresh Rate (VRR)βœ– βœ–
Quick Frame Transport (QFT)βœ– βœ–
3-D Readyβœ” βœ”
Video Signal Passthroughup to 4K/60p (4:4:4)up to 4K/60p (4:4:4)
Video Signal Upscalingβœ– βœ–
Analog To HDMI Upconversionβœ– βœ–
isf Certified Calibration Controlβœ– βœ–
MHL Inputβœ– βœ–
DLNA 1.5βœ– βœ–
FireConnectβœ– βœ–
FlareConnectβœ– βœ–
Chromecast Built-Inβœ– βœ–
DTS Play-Fiβœ– βœ–
Works with Amazon Alexaβœ– βœ–
Works with SONOSβœ– βœ–
AirPlayβœ– βœ–
Apple Product Connectionβœ– βœ–
Remote Appβœ– βœ–
InstaPrevue Input Source Prevueβœ– βœ–
Ethernetβœ– βœ–
Ethernet Switchβœ– βœ–
Wi-Fiβœ– βœ–
Bluetoothβœ” SBC, AACβœ”
HDBaseT Compatibleβœ– βœ–
Enhanced ARCβœ– βœ–
HDCP Version2.22.2
HDMI Input44
HDMI Output11
USB Input1 (Front)1 (Front)
USB DC Out Portβœ– βœ–
Analog Audio Line Input33
Analog Audio Line Outputβœ– βœ–
Phono Inputβœ– βœ–
Optical In11
Optical Outβœ– βœ–
Coaxial In/Out1 / βœ– 1 / βœ–
Composite Video Input22
Composite Video Output11
S-Video Inputβœ– βœ–
S-Video Outputβœ– βœ–
Component Video Inputβœ– βœ–
Component Video Outputβœ– βœ–
PC Inβœ– βœ–
Multi-Channel Inputβœ– βœ–
Analog Pre-Outs0.20.1
XLR Inputsβœ– βœ–
XLR Pre-outsβœ– βœ–
Front A/V InputsUSBUSB
Speaker A/Bβœ– βœ–
Headphone Outβœ” 6.3 mmβœ” 6.3 mm
ZONES Onkyo TX-SR373 Onkyo TX-SR353
Whole House Modeβœ– βœ–
RS-232βœ– βœ–
+12V Trigger Output00
Remote (IR) Input/Output0 / 00 / 0
MISC Onkyo TX-SR373 Onkyo TX-SR353
Detachable Power Cordβœ– βœ–
uportβœ– βœ–
ONKYO-RI System Controlβœ– βœ–
RIHD (Remote Interactive Over HDMI)βœ– βœ–
Pre-Pro/Learning Remoteβœ– / βœ– βœ– / βœ–
On Screen Remote Programmingβœ– βœ–
Bi-directional Remote Setup via GUIβœ– βœ–
RADIO Onkyo TX-SR373 Onkyo TX-SR353
Analog Tunerβœ” FM/AMβœ” FM/AM
Digital Radioβœ– βœ–
Internet Radioβœ– βœ–
Pandoraβœ– βœ–
Spotifyβœ– βœ–
Tidalβœ– βœ–
Deezerβœ– βœ–
Napsterβœ– βœ–
SiriusXM Internet Radioβœ– βœ–
Solid Aluminum Frontβœ– βœ–
Speaker Terminals55
Large Speaker Terminals22
Color-Coded Speaker Terminalsβœ– βœ–
Transparent High-Grade Speaker Terminalsβœ– βœ–
18mm Pitch High Grade Pre-outsβœ– βœ–
19mm-Pitch Audio Inputsβœ– βœ–
Gold plated RCA terminalsβœ– βœ–
POWER Onkyo TX-SR373 Onkyo TX-SR353
Power SupplyAC 120 V, 60 HzAC 120 V, 60 Hz
Independent Power Supplyβœ– βœ–
H.C.P.S. (High Current Power Supply)βœ– βœ–
Toroidal Transformerβœ– βœ–
Power Consumption210 W210 W
Standby Power0.35 W0.45 W
GENERAL Onkyo TX-SR373 Onkyo TX-SR353
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"
435 mm x 168 mm x 326.5 mm
17-1/8" x 6-5/8" x 12-7/8"
Weight8.0 kg (17 lb 10 oz)8.0 kg (17 lb 10 oz)
Warranty2 Years2 Years
SPECS Onkyo TX-SR373 Onkyo TX-SR353
Power Output (8 Ω, 20 Hz - 20 kHz, 280 W (0.08% THD)80 W (0.08% THD)
THD0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)0.06% (20 Hz - 20 kHz, 8 Ω, 1 Channel Driven, 50 W)
Input Sensitivity and Impedance (Line)200 mV/47 kΩ200 mV/47 kΩ
S/N Ratio (Line, IHF-A)106 dB98 dB
Frequency Response (Analog In)5 Hz - 100 kHz/0 dB, -3 dB (Direct)5 Hz - 100 kHz/0 dB, -3 dB (Direct mode)
DSD Sampling Rates via HDMI2.8 MHz2.8 MHz
Video Input Sensitivity/Output Level and Impedance1 Vp-p/75 Ω (Composite)1 Vp-p/75 Ω (Composite)
FM Frequency87.5 MHz - 107.9 MHz87.5 MHz - 108.0 MHz
AM Frequency530 kHz - 1700 kHz530 kHz - 1700 kHz

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

Amazon Affiliate Disclosure

ZKelectronics is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon (.com, .co.uk, .ca, etc) and any other websites that may be affiliated with Amazon Service LLC Associates Program.