Onkyo TX-SR373 vs Onkyo TX-NR609

      Onkyo TX-SR373

      Onkyo TX-NR609
      69
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      74
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      North America
      Europe
      USA
      Taiwan 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
      • 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • THX™Select™2 Plus Certified
      • 4K/30Hz Upscaling
      • Ethernet

      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-NR609
      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-NR609 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-NR609 has 7 channel amplifiers with Onkyo TX-SR373's being less powerful.


      Onkyo TX-SR373 Onkyo TX-NR609

      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-NR609 was introduced in 2011. It is equipped with 7 channel amplifier with 100 W (8 Ω, 20 Hz - 20 kHz and 2 channel driven) power per channel and is capable of 7.1 maximum channel processing. It , passes 1080/60p and upscales up to 4K/30p (Marvell Qdeo) video signal.

      We evaluated Onkyo TX-SR373 and Onkyo TX-NR609 and gave them scores of 69 and 74 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-NR609

      Amplifier
      71
      Amplifier
      83
      Audio Features
      62
      Audio Features
      71
      Video Features
      90
      Video Features
      58
      Connectivity
      62
      Connectivity
      74
      Zones
      55
      Zones
      77
      Radio
      59
      Radio
      93
      OVERALL
      69
      OVERALL
      74

      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-NR609.

      PROS

      Onkyo TX-SR373

      Onkyo TX-NR609

      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Bluetooth
      •   USB Input
      •   Composite Video Inputs
      •   Analog Tuner
      •   THX™ Certification
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   Analog To HDMI Upconversion
      •   USB Input
      •   Many RCA Line Inputs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Digital Radio
      •   Pandora
      •   Spotify

      CONS

      Onkyo TX-SR373

      Onkyo TX-NR609

      •   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
      •   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
      •   No Bluetooth
      •   Does not Work with Amazon Alexa
      •   1 HDMI Outputs
      •   0 8K Input
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Tidal


      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-NR609

      •   7.2 Channels
      •   Power Output - 100 W
      •   7.1 Channel Processing
      •   Wi-Fi
      •   6 HDMI Inputs
      •   2 Zones

      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-NR609.

      Check the Price

      Onkyo TX-SR373
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      Onkyo TX-SR373 vs Onkyo TX-NR609
      HDR10 vs
      BT.2020 color space vs
      Dolby Vision vs
      Video Signal Passthrough up to 4K/60p (4:4:4) vs up to 1080p
      Bluetooth SBC, AAC vs
      Lower THD 0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W) vs 0.08% (20 Hz - 20 kHz, Half power)

      4. Advantage of Onkyo TX-NR609

      This section shows those features and specifications which are the reason to choose Onkyo TX-NR609 over Onkyo TX-SR373.

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      Onkyo TX-NR609
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      Onkyo TX-SR373 vs Onkyo TX-NR609
      More Channels 5.2 vs 7.2
      Higher Power Output 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) vs 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Optimum Gain Volume Circuitry vs
      THX™ Certification vs Select™2 Plus
      More Channel Processing 5.1 vs 7.1
      Dolby Pro Logic PLII vs PLIIz
      Dolby Digital EX vs
      DTS Express vs
      DTS-ES vs Discrete 6.1, Matrix 6.1
      Music Playback via USB WMA, MP3, AAC vs FLAC, WAV, WMA, WMA Lossless, Ogg, MP3, LPCM, AAC
      Higher Resolution Music Playback via USB vs up to 96 kHz
      DSD via HDMI 2-ch vs 2-ch/Multi-ch Input
      Jitter Reduction vs PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
      THX Processing Mode vs
      Audyssey Dynamic EQ vs
      Audyssey Dynamic Volume vs
      Audyssey DSX vs Front Height
      Virtual Speakers vs T-D (Theater-Dimensional)
      Video Signal Upscaling vs up to 4K/30p (Marvell Qdeo)
      Analog To HDMI Upconversion vs Component, Composite, PC
      Wi-Fi vs via Front USB (optional UWF-1 sold separately)
      DLNA 1.5 vs
      Remote Controll App vs iPod touch/iPhone
      More HDMI Inputs 4 vs 6 (1 front)
      More Optical Inputs 1 vs 2
      More Coaxial Inputs/Outputs 1 vs 2
      More RCA Line Inputs 3 vs 6
      More RCA Line Outputs vs 1
      More Composite Video Inputs 2 vs 5 (1 front)
      More Composite Video Outputs 1 vs 2
      More Component Video Inputs vs 2
      More Component Video Outputs vs 1
      Ethernet vs
      PC In vs
      Front A/V Inputs USB vs HDMI, USB, Composite Video
      uport vs
      More Zones 1 vs 2
      ONKYO-RI System Control vs
      RIHD (Remote Interactive Over HDMI) vs
      Pre-Pro/Learning Remote / vs /
      On Screen Remote Programming vs
      More Presets 30 vs 40
      Digital Radio vs HD Radio via optional UP-HT1 Tuner (sold separately)
      Internet Radio vs vTuner
      Pandora vs
      Spotify vs
      Napster vs
      SiriusXM vs
      More Speaker Terminals 5 vs 9
      More Large Speaker Terminals 2 vs 7
      Color-Coded Speaker Terminals vs
      H.C.P.S. (High Current Power Supply) vs Massive High Power Transformer
      Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 80 W (0.08% THD) vs 100 W (0.08% THD)
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 155 W (10% THD) vs 175 W
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, IEC) 140 W (1% THD) vs 160 W (1% THD)
      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-NR609
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ Audyssey 2EQ
        USB Input1 (Front)1 Front
        Composite Video Inputs25 (1 front)
        Analog Tuner FM/AM FM/AM
      WEAKNESSES Onkyo TX-SR373 Onkyo TX-NR609
        No Front Wide Channel Support
        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 Passthroughup to 4K/60p (4:4:4)up to 1080p
        Does not Work with Amazon Alexa
        Few HDMI Outputs11
        Few 8K Inputs
        No Phono Input
        No RCA Pre-Outs0.20.2
        No Tidal

      6. Amplifier

      Onkyo TX-SR373 Onkyo TX-NR609

      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-NR609 features 7 channel power amplifier. It is rated at 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).
      • WRAT (Wide Range Amp Technology): Onkyo TX-NR609 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.
      • 3-Stage Inverted Darlington Circuitry: Onkyo TX-NR609 features 3-Stage Inverted Darlington Circuitry. Standard amplifiers employ a negative feedback (NFB) design that counters distortion by feeding back the opposite phase of the output signal into the input stage. Unfortunately, NFB is easily affected by inverse electromotive forces from the speakers, leading to an increase in circuit noise. Three-Stage Inverted Darlington Circuitry is a core Onkyo technology incorporating a low-NFB design that makes the sound more natural. Sensitive to oscillations, this circuitry requires very advanced control technology in order to be incorporated into the amplifier.

      THX™ Select™2 Plus certification

      Onkyo TX-NR609 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-NR609
      Channels5.27.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)100 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-NR609's amplifiers can be assigned for different speaker configurations.

      • Configurations: Available configurations are:
      • Onkyo TX-SR373: 5.2 with internal amplifier.
      • Onkyo TX-NR609: 5.2, 7.2 with internal amplifier.

      8. Immersive Audio Formats

      Audyssey DSX

      Onkyo TX-NR609 supports Audyssey DSX which allows you to augment a standard five-channel home theater with either two Front Wide or two Front High speakers. The Wide channels create an expansive soundstage and bring out convincing directional effects. Alternatively, Height channels can add a vertical dimension to movie and game soundtracks.


      AUDIO DECODING Onkyo TX-SR373 Onkyo TX-NR609
      Dolby Atmos
      Dolby Atmos Height Virtualization
      Dolby Atmos Music
      Dolby TrueHD
      Dolby Digital Plus
      Dolby Surround Upmixer
      Dolby Pro Logic PLII PLIIz
      Dolby Digital 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

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      Onkyo TX-NR609
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      9. HDMI

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

      Onkyo TX-NR609 comes with 6 HDMI inputs. It has 1 output.

      • 4K/60Hz Passthrough on Onkyo TX-SR373: All inputs pass up to 4K/60p (4:4:4) video signal.
        1080/60p Passthrough on Onkyo TX-NR609: All inputs pass up to 1080p video signal.
      • 4K Upscaling on Onkyo TX-NR609: It can upscale up to 4K/30p (Marvell Qdeo) from HDMI and analog sources.
      • Analog To HDMI Upconversion: Onkyo TX-NR609 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: Onkyo TX-SR373 is 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-NR609 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-NR609
      HDR10
      HDR10+
      Dynamic HDR
      BT.2020 color space
      Dolby Vision
      HLG (Hybrid Log Gamma)
      HDBaseT Compatible
      Enhanced Audio Return Channel (eARC)
      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 1080p
      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

      • Analog Line Inputs and Outputs: There are 3 pair of line inputs on Onkyo TX-SR373 and 6 pair of line inputs on Onkyo TX-NR609 for connecting sources with analog outputs. There is also 1 pair of line outputs on Onkyo TX-NR609.
      • Digital Inputs: 1 optical input and 1 coaxial input are available on Onkyo TX-SR373 and 2 optical inputs and 2 coaxial inputs are available on Onkyo TX-NR609 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-NR609
        Inputs:         6 (1 front)   Outputs: 1
        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-NR609
        Inputs:         5   Outputs: 2.
      • 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-NR609 supports up to 1080p resolution on Component video connectors.
      • Onkyo TX-SR373
        Inputs:         0   Outputs: 0.
      • Onkyo TX-NR609
        Inputs:         2   Outputs: 1.

      Front A/V Inputs

      • Onkyo TX-SR373: USB
      • Onkyo TX-NR609: HDMI, USB, Composite Video

      Onkyo TX-SR373

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      Onkyo TX-NR609

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      TERMINALS Onkyo TX-SR373 Onkyo TX-NR609
      HDMI Inputs46 (1 front)
      HDMI Outputs11
      8K Inputs
      USB Input1 (Front)1 Front
      USB DC Out Port
      Optical Inputs12
      Optical Outputs
      Coaxial Inputs12
      RCA Line Inputs36
      RCA Line Outputs1
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.2
      XLR Pre-outs
      Composite Video Inputs25 (1 front)
      Composite Video Outputs12
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs2
      Component Video Outputs1

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      Onkyo TX-NR609
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      11. Evaluations

      We evaluated Onkyo TX-SR373 and Onkyo TX-NR609 and gave them scores of 69 and 74 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-NR609

      OVERALL
      69
      OVERALL
      74

      Amplifier

      GOOD
      71
      •   Few Channels - 5.2
      •   Low Power Output - 80 W
      GOOD
      83
      •   7.2 Channels
      •   Power Output - 100 W
      •   THX™ Certification

      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
      71
      •   7.2 Channels
      •   No Front Wide Channel Support
      •   7.1 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

      Video Features

      EXCELLENT
      90
      •   HDR10
      •   No HDR10+
      •   Dolby Vision
      •   No 8K Passthrough
      AVERAGE
      58
      •   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
      74
      •   No eARC
      •   Wi-Fi
      •   No Bluetooth
      •   Does not Work with Amazon Alexa
      •   6 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   USB Input
      •   Many RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet

      Zones

      AVERAGE
      55
      •   No Zones
      GOOD
      77
      •   2 Zones

      Radio

      AVERAGE
      59
      •   Analog Tuner
      •   No Pandora
      •   No Spotify
      •   No Tidal
      EXCELLENT
      93
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   No Tidal

      12. Specifications

      GENERAL Onkyo TX-SR373 Onkyo TX-NR609
      BrandOnkyoOnkyo
      ModelTX-SR373TX-NR609
      TypeA/V ReceiverA/V Receiver
      CountryNorth AmericaUSA
      Release Year20172011
      PredecessorOnkyo TX-SR353
      SuccessorOnkyo TX-SR383 Onkyo TX-NR616
      AMPLIFIER Onkyo TX-SR373 Onkyo TX-NR609
      Channels5.27.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)100 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
      PUSH-PULL Design
      Independent Block Construction (Amp/Preprocessor)
      Bi-amp Capability
      BTL (Bridged Transless or Bridging)
      AUDIO FEATURES Onkyo TX-SR373 Onkyo TX-NR609
      Digital Processing Crossover Network
      Digital Signal Processing (DSP) EngineAdvanced 32-Bit Processing DSP Chip
      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 PLIIz
      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, WMA, WMA Lossless, Ogg, MP3, LPCM, AAC
      High Resolution Music Playback via USB and/or Network up to 96 kHz
      High Resolution Audio Formats via USBFLAC, WAV, WMA Lossless, LPCM, AAC
      Gapless Playback
      DSD via HDMI 2-ch 2-ch/Multi-ch Input
      DSD via USB
      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
      High-resolution Music Enhancer
      THX Processing Mode
      Audyssey Dynamic EQ
      Audyssey Dynamic Volume
      Audyssey LFC
      Audyssey Sub EQ HT
      Audyssey DSX Front Height
      Phase-Matching Bass Boost
      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-NR609
      Auto Speaker Calibration System with Mic. AccuEQ Audyssey 2EQ
      Audyssey App Support
      VIDEO FEATURES Onkyo TX-SR373 Onkyo TX-NR609
      HDR10
      HDR10+
      Dynamic HDR
      BT.2020 color space
      Dolby Vision
      HLG (Hybrid Log Gamma)
      HDBaseT Compatible
      Enhanced Audio Return Channel (eARC)
      HDCP Version2.2
      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 1080p
      Video Signal Upscaling up to 4K/30p (Marvell Qdeo)
      Analog To HDMI Upconversion Component, Composite, PC
      Component Video Upscaling
      Analog to Analog Video conversion
      Component Video Maximum Resolution1080p
      isf Certified Calibration Control
      CONNECTIVITY Onkyo TX-SR373 Onkyo TX-NR609
      Wi-Fi via Front USB (optional UWF-1 sold separately)
      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 iPod and iPhone via USB or optional UP-A1 Dock (sold separately)
      Remote App iPod touch/iPhone
      InstaPrevue Input Source Prevue
      TERMINALS Onkyo TX-SR373 Onkyo TX-NR609
      HDMI Inputs46 (1 front)
      HDMI Outputs11
      8K Inputs
      USB Input1 (Front)1 Front
      USB DC Out Port
      Optical Inputs12
      Optical Outputs
      Coaxial Inputs12
      RCA Line Inputs36
      RCA Line Outputs1
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.2
      XLR Pre-outs
      Composite Video Inputs25 (1 front)
      Composite Video Outputs12
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs2
      Component Video Outputs1
      Ethernet
      Ethernet Switch
      PC In
      Front A/V InputsUSBHDMI, USB, Composite Video
      Speaker A/B
      Headphone Out6.3 mm (1/4")6.3 mm (1/4")
      Detachable Power Cord
      uport
      ZONES Onkyo TX-SR373 Onkyo TX-NR609
      Number of Zones12
      Powered Zones 2
      Zone 2 OutsRCA Line Out
      Whole House Mode
      RS-232C Interface
      +12V Trigger Output0
      Remote (IR) Input/Output0 / 0
      MISCELLANEOUS Onkyo TX-SR373 Onkyo TX-NR609
      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-NR609
      Analog Tuner FM/AM FM/AM
      Presets3040
      Digital Radio HD Radio via optional UP-HT1 Tuner (sold separately)
      Internet Radio vTuner
      Pandora
      Spotify
      Tidal
      Deezer
      Napster
      SiriusXM
      CONSTRUCTION Onkyo TX-SR373 Onkyo TX-NR609
      Solid Aluminum Front
      Speaker Terminals59
      Large Speaker Terminals27
      Color-Coded Speaker Terminals
      Transparent High-Grade Speaker Terminals
      Gold plated RCA terminals
      POWER Onkyo TX-SR373 Onkyo TX-NR609
      Power SupplyAC 120 V, 60 HzAC 120 V, 60 Hz
      Independent Power Supply
      H.C.P.S. (High Current Power Supply) Massive High Power Transformer
      Toroidal Transformer
      Power Consumption210 W6.2 A
      Standby Power0.35 W0.2 W
      PHYSICAL Onkyo TX-SR373 Onkyo TX-NR609
      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 173.5 mm x 328 mm
      17-1/8" x 6-13/16" x 12-15/16"
      Weight8.0 kg (17 lb 10 oz)11.2 kg (24.7 lbs)
      SPECIFICATIONS Onkyo TX-SR373 Onkyo TX-NR609
      Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)80 W (0.08% THD)100 W (0.08% THD)
      Power Output (6 Ω, 1 kHz, 2 channel driven, FTC)125 W (0.1% THD)
      Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)155 W (10% THD)175 W
      Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)140 W (1% THD)160 W (1% THD)
      Dynamic Power per Channel (3 Ω, Front)240 W
      Dynamic Power per Channel (4 Ω, Front)210 W
      Dynamic Power per Channel (8 Ω, Front)120 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)
      Rated Lineout Level and Impedance200 mV/2.2 kΩ (REC OUT)
      Maximum Lineout Level and Impedance2 V/2.2 kΩ (REC OUT)
      S/N Ratio (Line, IHF-A)106 dB106 dB
      Frequency Response (Analog In)5 Hz - 100 kHz/0 dB, -3 dB (Direct)20 Hz - 50 kHz/+1 dB, -3 dB (DSP bypass)
      DSD Sampling Rates via HDMI2.8 MHz2.8 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 Standard100BASE-TX
      Bluetooth Version3.0
      Bluetooth Frequency2.4 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 - 107.9 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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