Onkyo TX-SR373 vs Onkyo TX-NR737

      Onkyo TX-SR373

      Onkyo TX-NR737
      69
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      82
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      North America
      Europe
      USA Taiwan
      Europe
      Others
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      Highlights

      • 5.2 Channels
      • 5.1 Channel Processing
      • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • HDR10, Dolby Vision
      • 4K/60Hz Passthrough
      • Bluetooth

      Highlights

      • 7.2 Channels
      • 7.1 Channel Processing
      • 110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • THX™Select™2 Plus Certified
      • Dolby Atmos
      • 4K/60Hz Passthrough, 4K/30Hz Upscaling
      • Wi-Fi, Bluetooth, Ethernet
      • Phono Input

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

      Table of Contents
      1. Overview
      2. Pros and Cons
      3. Advantage of Onkyo TX-SR373
      4. Advantage of Onkyo TX-NR737
      5. Common Strengths and Weaknesses
      6. Amplifier
      7. Speaker Configurations
      8. Immersive Audio Formats
      9. HDMI
      10. Inputs and Outputs
      11. Evaluations
      12. Specifications

      1. Overview

      Here we are comparing Onkyo TX-SR373 to Onkyo TX-NR737 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-NR737 has 7 channel amplifiers with Onkyo TX-SR373's being less powerful.


      Onkyo TX-SR373 Onkyo TX-NR737

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

      Onkyo TX-NR737 was introduced in 2014. It is equipped with 7 channel amplifier with 110 W (8 Ω, 20 Hz - 20 kHz and 2 channel driven) power per channel and is capable of 7.1 maximum channel processing. It supports Dolby Atmos, passes 4K/60Hz and upscales up to 4K/30p (Marvell Qdeo) video signal.

      We evaluated Onkyo TX-SR373 and Onkyo TX-NR737 and gave them scores of 69 and 82 out of 100 recpectively. Our ranking system is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

      Onkyo TX-SR373

      Onkyo TX-NR737

      Amplifier
      71
      Amplifier
      91
      Audio Features
      62
      Audio Features
      81
      Video Features
      90
      Video Features
      71
      Connectivity
      62
      Connectivity
      83
      Zones
      55
      Zones
      83
      Radio
      59
      Radio
      88
      OVERALL
      69
      OVERALL
      82

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

      2. Pros and Cons

      In this section we present pros and cons of Onkyo TX-SR373 and Onkyo TX-NR737.

      PROS

      Onkyo TX-SR373

      Onkyo TX-NR737

      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Bluetooth
      •   USB Input
      •   Composite Video Inputs
      •   Analog Tuner
      •   High Power Output - 110 W
      •   THX™ Certification
      •   Dolby Atmos
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   New HDCP Version
      •   Analog To HDMI Upconversion
      •   Wi-Fi
      •   Bluetooth
      •   7 HDMI Inputs
      •   USB Input
      •   Many RCA Line Inputs
      •   Phono Input
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   3 Zones
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Independent Power Supply

      CONS

      Onkyo TX-SR373

      Onkyo TX-NR737

      •   Few Channels - 5.2
      •   Low Power Output - 80 W
      •   No Front Wide Channel Support
      •   5.1 Channel Processing
      •   No Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No eARC
      •   No 8K Passthrough
      •   No Wi-Fi
      •   Does not Work with Amazon Alexa
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   Few RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Ethernet
      •   No Zones
      •   No Digital Radio
      •   No Pandora
      •   No Spotify
      •   No Tidal
      •   Bluetooth 3.0
      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10
      •   No HDR10+
      •   No Dolby Vision
      •   No eARC
      •   No 8K Passthrough
      •   Does not Work with Amazon Alexa
      •   0 8K Input
      •   No RCA Pre-Outs
      •   No Digital Radio
      •   No Tidal
      •   Bluetooth 2․1 + EDR


      And here are some specifications which fall into average criteria and are neither in PROs nor in CONs category:

      AVERAGE

      Onkyo TX-SR373

      Onkyo TX-NR737

      •   7.2 Channels
      •   7.1 Channel Processing
      •   2 HDMI Outputs

      3. Advantage of Onkyo TX-SR373

      This section shows those features and specifications which are the reason to choose Onkyo TX-SR373 over Onkyo TX-NR737.

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      Onkyo TX-SR373
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      Onkyo TX-SR373 vs Onkyo TX-NR737
      Dolby Pro Logic PLII vs
      HDR10 vs
      BT.2020 color space vs
      Dolby Vision vs
      Lower THD 0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W) vs 0.08% (20 Hz - 20 kHz, Half power)
      Newer Bluetooth Version 3.0 vs 2․1 + EDR

      4. Advantage of Onkyo TX-NR737

      This section shows those features and specifications which are the reason to choose Onkyo TX-NR737 over Onkyo TX-SR373.

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      Onkyo TX-NR737
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      Onkyo TX-SR373 vs Onkyo TX-NR737
      More Channels 5.2 vs 7.2
      Higher Power Output 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) vs 110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Optimum Gain Volume Circuitry vs
      THX™ Certification vs Select™2 Plus
      Certified 4 Ω Performance vs
      Bi-amp capability vs
      More Channel Processing 5.1 vs 7.1
      Dolby Atmos vs
      Dolby Surround Upmixer vs
      DTS Express vs
      DTS-ES vs Discrete 6.1, Matrix 6.1
      Music Playback via USB WMA, MP3, AAC vs FLAC, WAV, Apple Lossless, WMA, WMA Lossless, Ogg, MP3, DSD, AAC, LPCM, Dolby TruHD
      Higher Resolution Music Playback via USB vs up to 96 kHz
      DSD via HDMI 2-ch vs 2-ch/Multi-ch Input
      DSD via USB vs 2-ch Input
      Jitter Reduction vs PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
      Dialog Normalization vs
      THX Processing Mode vs
      Phase-Matching Bass Boost vs for Deep Bass and Clear Mid-Range
      Pure Audio Mode vs
      Virtual Speakers vs T-D (Theater-Dimensional)
      Video Signal Upscaling vs up to 4K/30p (Marvell Qdeo)
      Analog To HDMI Upconversion vs Component**, Composite
      Wi-Fi vs
      MHL Input vs Front HDMI
      DLNA 1.5 vs
      AirPlay vs AirPlay via optional Onkyo RI Dock DS-A5 (sold separately)
      Remote Controll App vs Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices
      InstaPrevue Input Source Prevue vs
      More HDMI Inputs 4 vs 7 (1 front)
      More HDMI Outputs 1 vs 2 (simultaneous)
      More Coaxial Inputs/Outputs 1 vs 2
      More RCA Line Inputs 3 vs 6
      Phono Input vs
      More Composite Video Inputs 2 vs 3
      More Component Video Inputs vs 1
      More Component Video Outputs vs 1
      Ethernet vs
      Front A/V Inputs USB vs HDMI/MHL, USB
      Detachable Power Cord vs
      More Zones 1 vs 3
      Whole House Mode vs
      ONKYO-RI System Control vs
      RIHD (Remote Interactive Over HDMI) vs
      Pre-Pro/Learning Remote / vs /
      On Screen Remote Programming vs
      Analog Tuner FM/AM vs FM/AM with RDS
      More Presets 30 vs 40
      Internet Radio vs TuneIn
      Pandora vs
      Spotify vs
      More Speaker Terminals 5 vs 9
      More Large Speaker Terminals 2 vs 9
      Color-Coded Speaker Terminals vs
      Independent Power Supply vs 2
      H.C.P.S. (High Current Power Supply) vs Massive High Power Transformer
      Bigger Power Supply 210 W vs 690 W
      Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 80 W (0.08% THD) vs 110 W (0.08% THD)
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 155 W (10% THD) vs 185 W
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, IEC) 140 W (1% THD) vs 170 W (1% THD)
      Higher DSD Sampling Rate via HDMI 2.8 MHz vs 2.8 MHz, 5.6 MHz
      Wider AM Frequency Range 530 kHz - 1700 kHz vs 522/530 kHz - 1611/1710 kHz

      5. Common Strengths and Weaknesses

      We already listed pros and cons of each model. However, you may also find useful to look at their common strengths and weaknesses shown side-by-side.

      STRENGTHS Onkyo TX-SR373 Onkyo TX-NR737
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ AccuEQ
        New HDCP Version2.22.2
        Bluetooth SBC, AAC
        USB Input1 (Front)1 (Front)
        Composite Video Inputs23
        Analog Tuner FM/AM FM/AM with RDS
      WEAKNESSES Onkyo TX-SR373 Onkyo TX-NR737
        No Front Wide Channel Support
        No Dolby Atmos Height Virtualization
        No DTS:X
        No IMAX Enhanced
        No Auro 3D with Auro-Matic Upmixer
        No HDR10+
        No eARC
        No 8K Passthroughup to 4K/60p (4:4:4)up to 4K/60p (YCbCr 4:2:0)
        Does not Work with Amazon Alexa
        Few 8K Inputs
        No RCA Pre-Outs0.20.2
        No Digital Radio
        No Tidal
        Old Bluetooth Version3.02․1 + EDR

      6. Amplifier

      Onkyo TX-SR373 Onkyo TX-NR737

      5 channel Amplifier: Onkyo TX-SR373 features 5 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).

      7 channel Amplifier: Onkyo TX-NR737 features 7 channel power amplifier. It is rated at 110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.
      • WRAT (Wide Range Amp Technology): 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™ Select™2 Plus certification

      Onkyo TX-NR737 is THX™ Select™2 Plus certified. 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.

      AMPLIFIER Onkyo TX-SR373 Onkyo TX-NR737
      Channels5.27.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Front Wide Channel Support
      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
      Independent Block Construction (Amp/Preprocessor)
      Bi-amp Capability
      BTL (Bridged Transless or Bridging)

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      Onkyo TX-SR373
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      7. Speaker Configurations

      Onkyo TX-SR373's and Onkyo TX-NR737's amplifiers can be assigned for different speaker configurations.

      • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
      • Onkyo TX-SR373: Not supported.
      • Onkyo TX-NR737: 5.2.2 with internal amplifier.
      • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
      • Onkyo TX-SR373: 5.2 with internal amplifier.
      • Onkyo TX-NR737: 5.2, 7.2 with internal amplifier.
      • Bi-Amp: Onkyo TX-NR737 is able to bi-amp up to 2 main channels simultaneously. During bi-amplification two amplifiers are used for one speaker. One amplifier powers the midrange and tweeter section of the speaker and another amplifier powers the low frequency woofers. Each amplifier is less loaded and performs better. In order to use this feature speakers must have 2 pairs of connectors.

      8. Immersive Audio Formats

      Dolby Atmos

      Onkyo TX-NR737 supports Dolby Atmos.

      • Dolby Surround Upmixer: Onkyo TX-NR737 supports Dolby Surround Upmixer. 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.
      AUDIO DECODING Onkyo TX-SR373 Onkyo TX-NR737
      Dolby Atmos
      Dolby Atmos Height Virtualization
      Dolby Atmos Music
      Dolby TrueHD
      Dolby Digital Plus
      Dolby Surround Upmixer
      Dolby Pro Logic PLII
      DTS:X
      DTS Neural:X
      DTS Virtual:X
      DTS Neo Neo:6 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

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      Onkyo TX-NR737
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      9. HDMI

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

      Onkyo TX-NR737 comes with 7 HDMI inputs. It has 2 outputs which work parallelly and output the same signal.

      • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K/60p (4:4:4) video signal.
      • 4K Upscaling on Onkyo TX-NR737: It can upscale up to 4K/30p (Marvell Qdeo) from HDMI and analog sources.
      • Analog To HDMI Upconversion: Onkyo TX-NR737 supports analog to HDMI Upconversion, so you can input your analog video sources and output them digitally via HDMI. This means that you will need only one HDMI cable to connect to your TV.
      • 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% (available on Onkyo TX-SR373 only).
      • HDCP 2.2 Copy Protection: Both receivers are HDCP 2.2 compliant which is a requirement for 4K/HDR copy-protected content transmission.
      • 3D Ready: Both receivers are able to pass 3D video through HDMI.

      HDR (High Dynamic Range)

      Onkyo TX-SR373 supports HDR10 and Dolby Vision.

      Onkyo TX-NR737 does not support HDR. 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 Onkyo TX-SR373 Onkyo TX-NR737
      HDR10
      HDR10+
      Dynamic HDR
      BT.2020 color space
      Dolby Vision
      HLG (Hybrid Log Gamma)
      HDBaseT Compatible
      Enhanced Audio Return Channel (eARC)
      HDCP Version2.22.2
      QMS (Quick Media Switching)
      ALLM (Auto Low Latency Mode)
      VRR (Variable Refresh Rate)
      QFT (Quick Frame transport)
      3-D Ready
      Video Signal Passthroughup to 4K/60p (4:4:4)up to 4K/60p (YCbCr 4:2:0)
      Video Signal Upscaling up to 4K/30p (Marvell Qdeo)

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      Onkyo TX-SR373
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      10. Inputs and Outputs

      Audio

      • Phono Input: There is an MM phono input on Onkyo TX-NR737 with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
      • Analog Line Inputs: There are 3 pair of line inputs on Onkyo TX-SR373 and 6 pair of line inputs on Onkyo TX-NR737 for connecting sources with analog outputs.
      • Digital Inputs: 1 optical input and 1 coaxial input are available on Onkyo TX-SR373 and 1 optical input and 2 coaxial inputs are available on Onkyo TX-NR737 for digital audio connections.
      • Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel of each receiver.

      Video

      • HDMI:
      • Onkyo TX-SR373
        Inputs:         4   Outputs: 1
        8K Inputs: 0.
      • Onkyo TX-NR737
        Inputs:         7 (1 front)   Outputs: 2 (simultaneous)
        8K Inputs: 0.
      • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
      • Onkyo TX-SR373
        Inputs:         2   Outputs: 1.
      • Onkyo TX-NR737
        Inputs:         3   Outputs: 1.
      • Component Video: Component video connection gives you the higher quality video compared to the composite video connection. So in case your old DVD player and other equipment do not have an HDMI output but have Component video output use this connection over the composite one. resolution on Component video connectors.
      • Onkyo TX-NR737 supports up to 1080i resolution on Component video connectors.
      • Onkyo TX-SR373
        Inputs:         0   Outputs: 0.
      • Onkyo TX-NR737
        Inputs:         1   Outputs: 1.

      Front A/V Inputs

      • Onkyo TX-SR373: USB
      • Onkyo TX-NR737: HDMI/MHL, USB

      Onkyo TX-SR373

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      Onkyo TX-NR737

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      TERMINALS Onkyo TX-SR373 Onkyo TX-NR737
      HDMI Inputs47 (1 front)
      HDMI Outputs12 (simultaneous)
      8K Inputs
      USB Input1 (Front)1 (Front)
      USB DC Out Port
      Optical Inputs11
      Optical Outputs
      Coaxial Inputs12
      RCA Line Inputs36
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.2
      XLR Pre-outs
      Composite Video Inputs23
      Composite Video Outputs11
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs1
      Component Video Outputs1

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      Onkyo TX-NR737
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      11. Evaluations

      We evaluated Onkyo TX-SR373 and Onkyo TX-NR737 and gave them scores of 69 and 82 out of 100 recpectively. We also gave separate scores for 7 different categories according to the available features and specifications some of which are listed below. These evaluations are relative and may change each time a new receiver is added to the database.


      Onkyo TX-SR373

      Onkyo TX-NR737

      OVERALL
      69
      OVERALL
      82

      Amplifier

      GOOD
      71
      •   Few Channels - 5.2
      •   Low Power Output - 80 W
      EXCELLENT
      91
      •   7.2 Channels
      •   High Power Output - 110 W
      •   THX™ Certification
      •   Independent Power Supply

      Audio Features

      AVERAGE
      62
      •   Few Channels - 5.2
      •   No Front Wide Channel Support
      •   5.1 Channel Processing
      •   No Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   DSD via HDMI
      GOOD
      81
      •   7.2 Channels
      •   No Front Wide Channel Support
      •   7.1 Channel Processing
      •   Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   DSD via HDMI

      Video Features

      EXCELLENT
      90
      •   HDR10
      •   No HDR10+
      •   Dolby Vision
      •   No 8K Passthrough
      GOOD
      71
      •   No HDR10
      •   No HDR10+
      •   No Dolby Vision
      •   No 8K Passthrough
      •   Analog To HDMI Upconversion

      Connectivity

      AVERAGE
      62
      •   No eARC
      •   New HDCP Version
      •   No Wi-Fi
      •   Bluetooth
      •   Does not Work with Amazon Alexa
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   USB Input
      •   Few RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   Composite Video Inputs
      •   No Ethernet
      •   Bluetooth 3.0
      GOOD
      83
      •   No eARC
      •   New HDCP Version
      •   Wi-Fi
      •   Bluetooth
      •   Does not Work with Amazon Alexa
      •   7 HDMI Inputs
      •   2 HDMI Outputs
      •   0 8K Input
      •   USB Input
      •   Many RCA Line Inputs
      •   Phono Input
      •   No RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Bluetooth 2․1 + EDR

      Zones

      AVERAGE
      55
      •   No Zones
      GOOD
      83
      •   3 Zones

      Radio

      AVERAGE
      59
      •   Analog Tuner
      •   No Pandora
      •   No Spotify
      •   No Tidal
      EXCELLENT
      88
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   No Tidal

      12. Specifications

      GENERAL Onkyo TX-SR373 Onkyo TX-NR737
      BrandOnkyoOnkyo
      ModelTX-SR373TX-NR737
      TypeA/V ReceiverA/V Receiver
      CountryNorth AmericaEurope
      Release Year20172014
      PredecessorOnkyo TX-SR353 Onkyo TX-NR727
      SuccessorOnkyo TX-SR383 Onkyo TX-NR747
      AMPLIFIER Onkyo TX-SR373 Onkyo TX-NR737
      Channels5.27.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Front Wide Channel Support
      Dynamic Audio Amplification
      Non-Phase Shift Amplifier
      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 FEATURES Onkyo TX-SR373 Onkyo TX-NR737
      Digital Signal Processing (DSP) EngineDual 32-bit DSP for Powerful Advanced Processing
      DACBurr-Brown
      DAC Specs192 kHz/24 Bit192 kHz/24 Bit
      Maximum Channel Processing5.17.1
      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
      Surround EX also known as Dolby Digital Surround EX
      DTS:X
      DTS Neural:X
      DTS Virtual:X
      DTS Neo Neo:6 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 2-ch/Multi-ch Input
      Music Playback via USBWMA, MP3, AACFLAC, 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 USBFLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC
      Gapless Playback
      DSD via HDMI 2-ch 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 Front L/R Channels
      Compressed Music Enhancer Advanced Music Optimizer 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 Subwoofer Outputs
      CALIBRATION Onkyo TX-SR373 Onkyo TX-NR737
      Auto Speaker Calibration System with Mic. AccuEQ AccuEQ
      VIDEO FEATURES Onkyo TX-SR373 Onkyo TX-NR737
      HDR10
      HDR10+
      Dynamic HDR
      BT.2020 color space
      Dolby Vision
      HLG (Hybrid Log Gamma)
      HDBaseT Compatible
      Enhanced Audio Return Channel (eARC)
      HDCP Version2.22.2
      QMS (Quick Media Switching)
      ALLM (Auto Low Latency Mode)
      VRR (Variable Refresh Rate)
      QFT (Quick Frame transport)
      3-D Ready
      Video Signal Passthroughup to 4K/60p (4:4:4)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 Resolution1080i
      isf Certified Calibration Control
      CONNECTIVITY Onkyo TX-SR373 Onkyo TX-NR737
      Wi-Fi
      Bluetooth SBC, AAC
      Works with Amazon Alexa
      Chromecast Built-In
      Works with SonoS
      DTS Play-Fi
      MHL Input Front HDMI
      DLNA 1.5
      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 AppOnkyo Remote App for iPod touch/iPhone and Android-Powered Devices
      InstaPrevue Input Source Prevue
      TERMINALS Onkyo TX-SR373 Onkyo TX-NR737
      HDMI Inputs47 (1 front)
      HDMI Outputs12 (simultaneous)
      8K Inputs
      USB Input1 (Front)1 (Front)
      USB DC Out Port
      Optical Inputs11
      Optical Outputs
      Coaxial Inputs12
      RCA Line Inputs36
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.2
      XLR Pre-outs
      Composite Video Inputs23
      Composite Video Outputs11
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs1
      Component Video Outputs1
      Ethernet
      Ethernet Switch
      PC In
      Front A/V InputsUSBHDMI/MHL, USB
      Speaker A/B
      Headphone Out6.3 mm (1/4")6.3 mm (1/4")
      Detachable Power Cord
      uport
      ZONES Onkyo TX-SR373 Onkyo TX-NR737
      Number of Zones13
      Powered Zones 2
      Zone 2 OutsRCA Line Out
      Zone 3 OutsRCA Line Out
      Whole House Mode
      RS-232C Interface
      +12V Trigger Output00
      Remote (IR) Input/Output0 / 00 / 0
      MISCELLANEOUS Onkyo TX-SR373 Onkyo TX-NR737
      On-Screen Display via HDMI Advanced "Home" GUI
      ONKYO-RI System Control
      RIHD (Remote Interactive Over HDMI)
      Pre-Pro/Learning Remote / /
      On Screen Remote Programming
      Bi-directional Remote Setup via GUI
      Activity Based Remote
      Smart Grid-Ready
      RADIO Onkyo TX-SR373 Onkyo TX-NR737
      Analog Tuner FM/AM FM/AM with RDS
      Presets3040
      Digital Radio
      Internet Radio TuneIn
      Pandora
      Spotify
      Tidal
      Deezer
      Napster
      SiriusXM
      CONSTRUCTION Onkyo TX-SR373 Onkyo TX-NR737
      Solid Aluminum Front
      Speaker Terminals59
      Large Speaker Terminals29
      Color-Coded Speaker Terminals
      Transparent High-Grade Speaker Terminals
      Gold plated RCA terminals
      POWER Onkyo TX-SR373 Onkyo TX-NR737
      Power SupplyAC 120 V, 60 HzAC 220-240 V, 50/60 Hz
      Independent Power Supply2
      H.C.P.S. (High Current Power Supply) Massive High Power Transformer
      Toroidal Transformer
      Power Consumption210 W690 W
      No Sound Power85 W
      Standby Power0.35 W0.2 W
      Capacitor Bank10,000 µF
      ECO Mode / Hybrid Standby Function
      PHYSICAL Onkyo TX-SR373 Onkyo TX-NR737
      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 175 mm x 379 mm
      17-1/8" x 6-7/8" x 14-15/16"
      Weight8.0 kg (17 lb 10 oz)11.5 kg (25.4 lbs)
      SPECIFICATIONS Onkyo TX-SR373 Onkyo TX-NR737
      Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)80 W (0.08% THD)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)155 W (10% THD)185 W
      Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)140 W (1% THD)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
      THD0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)0.08% (20 Hz - 20 kHz, Half power)
      Damping Factor60 (Front, 1 kHz, 8 Ω)
      Input Sensitivity and Impedance (Line)200 mV/47 kΩ200 mV/47 kΩ (Line)
      Input Sensitivity and Impedance (Phono MM)2.5 mV/47 kΩ
      Rated Preout Level and Impedance200 mV/470 Ω
      Maximum Lineout Level and Impedance2 V/2.2 kΩ
      Phono Overload70 mV (MM, 1kHz, 0.5% Direct)
      S/N Ratio (Line, IHF-A)106 dB106 dB
      S/N Ratio (Phono MM, IHF-A)80 dB
      Frequency Response (Analog In)5 Hz - 100 kHz/0 dB, -3 dB (Direct)5 Hz - 100 kHz/+1 dB, -3 dB (Direct Mode)
      DSD Sampling Rates via HDMI2.8 MHz2.8 MHz, 5.6 MHz
      DSD Sampling Rates via USB2.8 MHz
      Video Input Sensitivity/Output Level and Impedance 1 Vp-p/75 Ω (Composite)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 Response5 Hz - 100 MHz/+0 dB, -3 dB (Component)
      Ethernet Standard10BASE-T/100BASE-TX
      Wi-Fi StandardIEEE 802.11 b/g/n
      Wi-Fi Terminal Frequency2.4 GHz
      Bluetooth Version3.02․1 + EDR
      Bluetooth Frequency2.4 GHz2.4 GHz
      HDMI TerminalType A (19-pin)
      HDMI Output Type5 V, 55 mA
      USB Terminal5 V, 0.5 A
      FM Frequency87.5 MHz - 107.9 MHz87.5 MHz - 108.0 MHz
      AM Frequency530 kHz - 1700 kHz522/530 kHz - 1611/1710 kHz
      Warranty2 Years2 Years

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

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