Onkyo TX-SR494 vs Onkyo TX-NR509

      Onkyo TX-SR494

      Onkyo TX-NR509
      81
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      67
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      North America
      Europe Australia and Asia
      USA
      Taiwan Europe and Australia Others
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      Highlights

      • 7.2 Channels
      • 7.1 Channel Processing
      • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • Dolby Atmos, DTS:X
      • HDR10, Dolby Vision
      • 4K/60Hz Passthrough, 4K/30Hz Upscaling
      • Bluetooth

      Highlights

      • 5.1 Channels
      • 5.1 Channel Processing
      • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • 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-SR494
      4. Advantage of Onkyo TX-NR509
      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-SR494 to Onkyo TX-NR509 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-SR494 has 7 channel and the Onkyo TX-NR509 has 5 channel amplifiers with Onkyo TX-SR494's being more powerful.


      Onkyo TX-SR494 Onkyo TX-NR509

      Onkyo TX-SR494 was introduced in 2019. It is equipped with 7 channel amplifier with 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) power per channel and is capable of 7.1 maximum channel processing. It supports Dolby Atmos and DTS:X, passes 4K/60Hz and upscales 1080p to 4K video signal.

      Onkyo TX-NR509 was introduced in 2011. 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 1080/60p video signal.

      We evaluated Onkyo TX-SR494 and Onkyo TX-NR509 and gave them scores of 81 and 67 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-SR494

      Onkyo TX-NR509

      Amplifier
      84
      Amplifier
      75
      Audio Features
      85
      Audio Features
      67
      Video Features
      95
      Video Features
      46
      Connectivity
      60
      Connectivity
      73
      Zones
      78
      Zones
      64
      Radio
      59
      Radio
      93
      OVERALL
      81
      OVERALL
      67

      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-SR494 and Onkyo TX-NR509.

      PROS

      Onkyo TX-SR494

      Onkyo TX-NR509

      •   Dolby Atmos
      •   Dolby Atmos Height Virtualization
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Bluetooth
      •   Analog Tuner
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   USB Input
      •   Many RCA Line Inputs
      •   RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Digital Radio
      •   Pandora
      •   Spotify

      CONS

      Onkyo TX-SR494

      Onkyo TX-NR509

      •   Low Power Output - 80 W
      •   No Front Wide Channel Support
      •   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
      •   No USB Input
      •   Few RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Composite Video Inputs
      •   No Ethernet
      •   No Digital Radio
      •   No Pandora
      •   No Spotify
      •   No Tidal
      •   Few Channels - 5.1
      •   Low Power Output - 80 W
      •   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 HDR10+
      •   No Dolby Vision
      •   No eARC
      •   No 8K Passthrough
      •   No Bluetooth
      •   Does not Work with Amazon Alexa
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   No Phono Input
      •   No Tidal


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

      AVERAGE

      Onkyo TX-SR494

      Onkyo TX-NR509

      •   7.2 Channels
      •   7.1 Channel Processing
      •   2 Zones
      •   Bluetooth 4․2
      •   Wi-Fi
      •   2 Zones

      3. Advantage of Onkyo TX-SR494

      This section shows those features and specifications which are the reason to choose Onkyo TX-SR494 over Onkyo TX-NR509.

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      Onkyo TX-SR494
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      Onkyo TX-SR494 vs Onkyo TX-NR509
      More Channels 7.2 vs 5.1
      Certified 4 Ω Performance vs
      Bi-amp capability vs
      Higher DAC Specs 384 kHz/32 Bit vs 192 kHz/24 Bit
      More Channel Processing 7.1 vs 5.1
      Dolby Atmos vs
      Dolby Atmos Height Virtualization vs
      Dolby Surround Upmixer vs
      DTS:X vs
      DTS Neural:X vs
      DTS Virtual:X vs
      DTS Dialog Control vs
      Dialog Normalization vs
      HDR10 vs
      BT.2020 color space vs
      Dolby Vision vs
      HLG vs
      Video Signal Passthrough up to 4K/60p (RGB/YCbCr4:4:4) vs up to 1080p
      Video Signal Upscaling 1080p to 4K vs
      Bluetooth SBC, AAC vs
      USB DC Out Port vs
      More Powered Zones 2 vs
      Zone 2 Outs Zone B Pre/Line Out vs RCA Line Out
      More Speaker Terminals 7 vs 5
      Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 100 W (0.08% THD) vs 80 W (0.7% THD)
      Higher S/N Ratio (Line, IHF-A) 109 db vs 100 dB

      4. Advantage of Onkyo TX-NR509

      This section shows those features and specifications which are the reason to choose Onkyo TX-NR509 over Onkyo TX-SR494.

      Check the Price

      Onkyo TX-NR509
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      Onkyo TX-SR494 vs Onkyo TX-NR509
      Optimum Gain Volume Circuitry vs
      Dolby Pro Logic vs PLIIx
      Dolby Digital EX vs
      DTS Neo vs Neo:6
      Music Playback via USB 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
      Audyssey Dynamic EQ vs
      Audyssey Dynamic Volume vs
      Wi-Fi vs via Front USB (optional UWF-1 sold separately)
      Remote Controll App vs iPod touch/iPhone
      USB Input vs 1 Front
      More Optical Inputs 1 vs 2
      More Coaxial Inputs/Outputs 1 vs 2
      More RCA Line Inputs 3 vs 6 (1 front)
      More RCA Line Outputs vs 1
      More RCA Pre-Outs 0.2 vs 2.1 (Surround Back and Sub)
      More Composite Video Inputs vs 5 (1 front)
      More Composite Video Outputs vs 2
      More Component Video Inputs vs 2
      More Component Video Outputs vs 1
      Ethernet vs
      Front A/V Inputs vs USB, Composite Video, RCA Audio
      uport vs
      ONKYO-RI System Control vs
      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 Large Speaker Terminals 2 vs 5
      Color-Coded Speaker Terminals vs
      H.C.P.S. (High Current Power Supply) vs Massive High Power Transformer
      Wider AM Frequency Range 530 kHz - 1710 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-SR494 Onkyo TX-NR509
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ Audyssey 2EQ
        Analog Tuner FM/AM FM/AM
      WEAKNESSES Onkyo TX-SR494 Onkyo TX-NR509
        Low Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        No IMAX Enhanced
        No Auro 3D with Auro-Matic Upmixer
        No HDR10+
        No eARC
        No 8K Passthroughup to 4K/60p (RGB/YCbCr4:4:4)up to 1080p
        Does not Work with Amazon Alexa
        Few HDMI Inputs44
        Few HDMI Outputs11
        Few 8K Inputs
        No Phono Input
        No Tidal

      6. Amplifier

      Onkyo TX-SR494 Onkyo TX-NR509

      7 channel Amplifier: Onkyo TX-SR494 features 7 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.

      5 channel Amplifier: Onkyo TX-NR509 features 5 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).


        AMPLIFIER Onkyo TX-SR494 Onkyo TX-NR509
        Channels7.25.1
        Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        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)

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        Onkyo TX-SR494
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        7. Speaker Configurations

        Onkyo TX-SR494's and Onkyo TX-NR509's amplifiers can be assigned for different speaker configurations.

        • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
        • Onkyo TX-SR494: 5.2.2 with internal amplifier.
        • Onkyo TX-NR509: Not supported.
        • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
        • Onkyo TX-SR494: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2 with internal amplifier.
        • Onkyo TX-NR509: Not supported.
        • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
        • Onkyo TX-SR494: 5.2, 7.2 with internal amplifier.
        • Onkyo TX-NR509: 5.1 with internal amplifier.
        • Bi-Amp: Onkyo TX-SR494 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-SR494 supports Dolby Atmos.

        • Dolby Surround Upmixer: Onkyo TX-SR494 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.
        • Dolby Atmos Height Virtualization: Onkyo TX-SR494 supports Dolby Atmos Height Virtualization which is a digital signal processing solution that leverages Dolby's deep understanding of human audio perception to create the sensation of overhead sound from the listener-level speakers.

        DTS:X

        Onkyo TX-SR494 supports DTS:X.

        • DTS Neural:X: Onkyo TX-SR494 supports DTS Neural:X which is an advanced upmixer that can take non DTS:X content and upmix it to the DTS:X speaker layout. It has replaced the DTS Neo family with improved flexibility.
        • DTS Virtual:X: Onkyo TX-SR494 supports DTS Virtual:X which bridges the gap between DTS:X codec and the reality of so many consumers' homes, allowing you to enjoy multi-dimensional sound regardless of room size, layout, or speaker configuration. If you have a limited speaker setup you will miss a full immersive potential of your entertainment system. DTS Virtual:X adds height and surround audio effect to your system without adding height speakers. It works with multiple configurations and delivers immersive sound experience out of 5.1 or even 2.1 speaker layouts.
        • DTS Dialog Control: Onkyo TX-SR494 supports DTS Dialog Control. This function adjusts the dialog levels during playback of the DTS:X stream. It allows you to separately increase the dialog levels in contrast with the background sound and hear dialog easily even under noisy circumstances.
        AUDIO DECODING Onkyo TX-SR494 Onkyo TX-NR509
        Dolby Atmos
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic PLIIx
        Dolby Digital 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

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        Onkyo TX-NR509
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        9. HDMI

        Onkyo TX-SR494 and Onkyo TX-NR509 come with 4 HDMI inputs. It has 1 output.

        • 4K/60Hz Passthrough on Onkyo TX-SR494: All inputs pass up to 4K/60p (RGB/YCbCr4:4:4) video signal.
          1080/60p Passthrough on Onkyo TX-NR509: All inputs pass up to 1080p video signal.
        • 4K Upscaling on Onkyo TX-SR494: It can upscale 1080p to 4K from HDMI sources.
        • 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-SR494 only).
        • HDCP 2.3 Copy Protection: Onkyo TX-SR494 is HDCP 2.3 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-SR494 supports HDR10, Dolby Vision and Hybrid Log-Gamma.

        Onkyo TX-NR509 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-SR494 Onkyo TX-NR509
        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 (RGB/YCbCr4:4:4)up to 1080p
        Video Signal Upscaling 1080p to 4K

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        Onkyo TX-SR494
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        10. Inputs and Outputs

        Audio

        • Analog Pre-Outs: Onkyo TX-NR509 has 2.1 preamplifier outputs which allows you to connect the receiver to the external power amplifier. You may want to use a high quality external amplifier for certain channels, usually for front L/R and center, and use the receiver to power the rest.
        • Analog Line Inputs and Outputs: There are 3 pair of line inputs on Onkyo TX-SR494 and 6 pair of line inputs on Onkyo TX-NR509 for connecting sources with analog outputs. There is also 1 pair of line outputs on Onkyo TX-NR509.
        • Digital Inputs: 1 optical input and 1 coaxial input are available on Onkyo TX-SR494 and 2 optical inputs and 2 coaxial inputs are available on Onkyo TX-NR509 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-SR494
          Inputs:           4   Outputs: 1
          8K Inputs: 0.
        • Onkyo TX-NR509
          Inputs:           4   Outputs: 1
          8K Inputs: 0.
        • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
        • Onkyo TX-SR494
          Inputs:           0   Outputs: 0.
        • Onkyo TX-NR509
          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. resolution on Component video connectors.
        • Onkyo TX-SR494
          Inputs:           0   Outputs: 0.
        • Onkyo TX-NR509
          Inputs:           2   Outputs: 1.

        Front A/V Inputs

        • Onkyo TX-SR494: None
        • Onkyo TX-NR509: USB, Composite Video, RCA Audio

        Onkyo TX-SR494

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        Onkyo TX-NR509

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        TERMINALS Onkyo TX-SR494 Onkyo TX-NR509
        HDMI Inputs44
        HDMI Outputs11
        8K Inputs
        USB Input1 Front
        USB DC Out Port
        Optical Inputs12
        Optical Outputs
        Coaxial Inputs12
        RCA Line Inputs36 (1 front)
        RCA Line Outputs1
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.22.1 (Surround Back and Sub)
        XLR Pre-outs
        Composite Video Inputs5 (1 front)
        Composite Video Outputs2
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs2
        Component Video Outputs1

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        Onkyo TX-NR509
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        11. Evaluations

        We evaluated Onkyo TX-SR494 and Onkyo TX-NR509 and gave them scores of 81 and 67 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-SR494

        Onkyo TX-NR509

        OVERALL
        81
        OVERALL
        67

        Amplifier

        GOOD
        84
        •   7.2 Channels
        •   Low Power Output - 80 W
        GOOD
        75
        •   Few Channels - 5.1
        •   Low Power Output - 80 W

        Audio Features

        EXCELLENT
        85
        •   7.2 Channels
        •   No Front Wide Channel Support
        •   7.1 Channel Processing
        •   Dolby Atmos
        •   Dolby Atmos Height Virtualization
        •   DTS:X
        •   No IMAX Enhanced
        •   No Auro 3D with Auro-Matic Upmixer
        •   DSD via HDMI
        AVERAGE
        67
        •   Few Channels - 5.1
        •   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

        Video Features

        EXCELLENT
        95
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   No 8K Passthrough
        POOR
        46
        •   No HDR10
        •   No HDR10+
        •   No Dolby Vision
        •   No 8K Passthrough

        Connectivity

        AVERAGE
        60
        •   No eARC
        •   New HDCP Version
        •   No Wi-Fi
        •   Bluetooth
        •   Does not Work with Amazon Alexa
        •   4 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   No USB Input
        •   Few RCA Line Inputs
        •   No Phono Input
        •   No RCA Pre-Outs
        •   No Composite Video Inputs
        •   No Ethernet
        •   Bluetooth 4․2
        GOOD
        73
        •   No eARC
        •   Wi-Fi
        •   No Bluetooth
        •   Does not Work with Amazon Alexa
        •   4 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   Many RCA Line Inputs
        •   No Phono Input
        •   RCA Pre-Outs
        •   Composite Video Inputs
        •   Component Video Inputs
        •   Ethernet

        Zones

        GOOD
        78
        •   2 Zones
        AVERAGE
        64
        •   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-SR494 Onkyo TX-NR509
        BrandOnkyoOnkyo
        ModelTX-SR494TX-NR509
        TypeA/V ReceiverA/V Receiver
        CountryNorth AmericaUSA
        Release Year20192011
        SuccessorOnkyo TX-NR515
        AMPLIFIER Onkyo TX-SR494 Onkyo TX-NR509
        Channels7.25.1
        Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 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
        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-SR494 Onkyo TX-NR509
        Digital Processing Crossover Network
        Digital Signal Processing (DSP) Engine32-bit Digital Signal Processing EnginesAdvanced 32-Bit Processing DSP Chip
        DACAKMBurr-Brown
        DAC Specs384 kHz/32 Bit192 kHz/24 Bit
        Maximum Channel Processing7.15.1
        Air Studios Monitor Certification
        Dolby Atmos
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic PLIIx
        Dolby Digital EX
        THX Listening Modes
        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 2-ch/Multi-ch Input
        Music Playback via USBFLAC, 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
        Phase-Matching Bass Boost
        Direct Mode
        Pure Audio Mode
        Pure Direct Analog Path Mode
        Virtual Speakers T-D (Theater-Dimensional) T-D (Theater-Dimensional)
        Independent Subwoofer Outputs
        CALIBRATION Onkyo TX-SR494 Onkyo TX-NR509
        Auto Speaker Calibration System with Mic. AccuEQ Audyssey 2EQ
        Audyssey App Support
        VIDEO FEATURES Onkyo TX-SR494 Onkyo TX-NR509
        HDR10
        HDR10+
        Dynamic HDR
        BT.2020 color space
        Dolby Vision
        HLG (Hybrid Log Gamma)
        HDBaseT Compatible
        Enhanced Audio Return Channel (eARC)
        HDCP Version2.3
        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 (RGB/YCbCr4:4:4)up to 1080p
        Video Signal Upscaling 1080p to 4K
        Analog To HDMI Upconversion
        Component Video Upscaling
        Analog to Analog Video conversion
        isf Certified Calibration Control
        CONNECTIVITY Onkyo TX-SR494 Onkyo TX-NR509
        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-SR494 Onkyo TX-NR509
        HDMI Inputs44
        HDMI Outputs11
        8K Inputs
        USB Input1 Front
        USB DC Out Port
        Optical Inputs12
        Optical Outputs
        Coaxial Inputs12
        RCA Line Inputs36 (1 front)
        RCA Line Outputs1
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.22.1 (Surround Back and Sub)
        XLR Pre-outs
        Composite Video Inputs5 (1 front)
        Composite Video Outputs2
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs2
        Component Video Outputs1
        Ethernet
        Ethernet Switch
        PC In
        Front A/V InputsUSB, Composite Video, RCA Audio
        Speaker A/B
        Headphone Out6.3 mm (1/4")6.3 mm (1/4")
        Detachable Power Cord
        uport
        ZONES Onkyo TX-SR494 Onkyo TX-NR509
        Number of Zones22
        Powered Zones 2
        Zone 2 OutsZone B Pre/Line OutRCA Line Out
        Whole House Mode
        RS-232C Interface
        +12V Trigger Output0
        Remote (IR) Input/Output0 / 0
        MISCELLANEOUS Onkyo TX-SR494 Onkyo TX-NR509
        On-Screen Display Basic Overlay
        GUI Languages7
        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-SR494 Onkyo TX-NR509
        Analog Tuner FM/AM FM/AM
        Presets4040
        Digital Radio HD Radio via optional UP-HT1 Tuner (sold separately)
        Internet Radio vTuner
        Pandora
        Spotify
        Tidal
        Deezer
        Napster
        SiriusXM
        CONSTRUCTION Onkyo TX-SR494 Onkyo TX-NR509
        Solid Aluminum Front
        Speaker Terminals75
        Large Speaker Terminals25
        Color-Coded Speaker Terminals
        Transparent High-Grade Speaker Terminals
        Gold plated RCA terminals
        POWER Onkyo TX-SR494 Onkyo TX-NR509
        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 Consumption490 W3.9 A
        No Sound Power45 W
        Standby Power0.1 W0.2 W
        PHYSICAL Onkyo TX-SR494 Onkyo TX-NR509
        Dimensions (W x H x D)435 mm x 160 mm x 328 mm
        17-1/8" x 6-5/16" x 12-15/16"        		435 mm x 173.5 mm x 328 mm
        17-1/8" x 6-13/16" x 12-15/16"
        Dimensions of Package (W x H x D)525 mm x 240 mm x 405 mm
        20-11/16" x 9-7/16" x 15-15/16"
        Weight8.2 kg (18.1 lb 10 oz)8.5 kg (18.7 lbs)
        Weight of Package10.5 kg (23.1 lbs)
        SPECIFICATIONS Onkyo TX-SR494 Onkyo TX-NR509
        Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)100 W (0.08% THD)80 W (0.7% THD)
        Power Output (6 Ω, 1 kHz, 2 channel driven, FTC)110 W (0.9% THD)
        Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)160 W (10% THD)160 W
        Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)130 W (1% THD)
        Dynamic Power per Channel (3 Ω, Front)180 W
        Dynamic Power per Channel (4 Ω, Front)160 W
        Dynamic Power per Channel (8 Ω, Front)100 W
        THD0.08% (20 Hz - 20 kHz, Half power)0.08% (20 Hz - 20 kHz, Half power)
        Damping Factor60 (Front, 1 kHz, 8 Ω)
        Input Sensitivity and Impedance (Line)200 mV/47 kΩ (1 kHz, 100 W/8 Ω)200 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)
        Rated Headphone Power Output80 mW (32 Ω, 1 kHz, 10% THD)
        S/N Ratio (Line, IHF-A)109 db100 dB
        Frequency Response (Analog In)10 Hz - 100 kHz/+1 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 (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 Version4․2
        Bluetooth Frequency2.4 GHz
        USB Terminal5 V, 1 A
        FM Frequency87.5 MHz - 107.9 MHz87.5 MHz - 107.9 MHz
        FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)Mono: 1.0 µV (11.2 dBf)
        AM Frequency530 kHz - 1710 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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