Onkyo TX-NR686 vs Onkyo TX-SR444

      Onkyo TX-NR686

      Onkyo TX-SR444
      88
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      71
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      North America
      Taiwan Europe Australia and Asia
      USA
      Taiwan Europe, Australia and Asia Others
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      Highlights

      • 7.2 Channels
      • 7.1 Channel Processing
      • 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • THX™Select™ Certified
      • Dolby Atmos, DTS:X
      • HDR10, Dolby Vision
      • 4K/60Hz Passthrough
      • Wi-Fi, Bluetooth, Ethernet
      • Phono Input

      Highlights

      • 7.1 Channels
      • 7.1 Channel Processing
      • 65 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • Dolby Atmos
      • 4K/60Hz Passthrough
      • Bluetooth

      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-NR686
      4. Advantage of Onkyo TX-SR444
      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-NR686 to Onkyo TX-SR444 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-NR686 has 7 channel and the Onkyo TX-SR444 has 7 channel amplifiers with Onkyo TX-NR686's being more powerful.


      Onkyo TX-NR686 Onkyo TX-SR444

      Onkyo TX-NR686 was introduced in 2018. It is equipped with 7 channel amplifier with 100 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 video signal.

      Onkyo TX-SR444 was introduced in 2015. It is equipped with 7 channel amplifier with 65 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 video signal.

      We evaluated Onkyo TX-NR686 and Onkyo TX-SR444 and gave them scores of 88 and 71 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-NR686

      Onkyo TX-SR444

      Amplifier
      89
      Amplifier
      73
      Audio Features
      86
      Audio Features
      78
      Video Features
      94
      Video Features
      67
      Connectivity
      85
      Connectivity
      64
      Zones
      77
      Zones
      77
      Radio
      92
      Radio
      59
      OVERALL
      88
      OVERALL
      71

      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-NR686 and Onkyo TX-SR444.

      PROS

      Onkyo TX-NR686

      Onkyo TX-SR444

      •   THX™ Certification
      •   Dolby Atmos
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Analog To HDMI Upconversion
      •   Wi-Fi
      •   Bluetooth
      •   Chromecast Built-In
      •   7 HDMI Inputs
      •   USB Input
      •   Many RCA Line Inputs
      •   Phono Input
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Tidal
      •   Dolby Atmos
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   New HDCP Version
      •   Analog To HDMI Upconversion
      •   Bluetooth
      •   Many RCA Line Inputs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Analog Tuner
      •   Independent Power Supply

      CONS

      Onkyo TX-NR686

      Onkyo TX-SR444

      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No eARC
      •   No 8K Passthrough
      •   Does not Work with Amazon Alexa
      •   0 8K Input
      •   No RCA Pre-Outs
      •   No Digital Radio
      •   Low Power Output - 65 W
      •   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
      •   No Wi-Fi
      •   Does not Work with Amazon Alexa
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   No USB Input
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Ethernet
      •   No Digital Radio
      •   No Pandora
      •   No Spotify
      •   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-NR686

      Onkyo TX-SR444

      •   7.2 Channels
      •   Power Output - 100 W
      •   7.1 Channel Processing
      •   2 HDMI Outputs
      •   2 Zones
      •   Bluetooth 4․1 + LE
      •   7.1 Channels
      •   7.1 Channel Processing
      •   2 Zones

      3. Advantage of Onkyo TX-NR686

      This section shows those features and specifications which are the reason to choose Onkyo TX-NR686 over Onkyo TX-SR444.

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      Onkyo TX-NR686
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      Onkyo TX-NR686 vs Onkyo TX-SR444
      More Channels 7.2 vs 7.1
      Higher Power Output 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) vs 65 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      VLSC (Vector Linear Shaping Circuitry) Front L/R channels vs
      THX™ Certification Select™ (previously known as Select2) vs
      Certified 4 Ω Performance vs
      Bi-amp capability vs
      Higher DAC Specs 384 kHz/32 Bit vs 192 kHz/24 Bit
      DTS:X vs
      DTS Neural:X vs
      DTS Dialog Control vs
      Dialog Normalization vs
      THX Processing Mode vs
      HDR10 vs
      BT.2020 color space vs
      Dolby Vision vs
      HLG vs
      Wi-Fi vs
      Chromecast Built-In vs
      Works with SONOS requires firmware update & Sonos Connect vs
      DTS Play-Fi vs
      AirPlay AirPlay 2 after firmware update vs
      Remote Controll App Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices vs
      More HDMI Inputs 7 (1 front) vs 4
      More HDMI Outputs 2 (simultaneous) vs 1
      USB Input 1 (Rear) vs
      Phono Input vs
      Ethernet vs
      Front A/V Inputs HDMI, Mini-Jack vs Composite Video, RCA Audio
      Zone 2 Outs RCA Line Out vs
      Internet Radio TuneIn vs
      Pandora vs
      Spotify vs
      Tidal vs
      Deezer vs
      More Large Speaker Terminals 9 vs 2
      Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 100 W (0.08% THD) vs 65 W (0.7% THD)
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 210 W (10% THD) vs 120 W
      Higher Dynamic Power per Channel, 3 Ω, Front) 240 W vs 160 W
      Higher Dynamic Power per Channel, 4 Ω, Front) 210 W vs 125 W
      Higher Dynamic Power per Channel, 8 Ω, Front) 120 W vs 85 W
      Higher S/N Ratio (Line, IHF-A) 106 dB vs 100 dB
      Newer Bluetooth Version 4․1 + LE vs 2․1 + EDR

      4. Advantage of Onkyo TX-SR444

      This section shows those features and specifications which are the reason to choose Onkyo TX-SR444 over Onkyo TX-NR686.

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      Onkyo TX-SR444
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      Onkyo TX-NR686 vs Onkyo TX-SR444
      DTS Neo vs Neo:6
      USB DC Out Port vs 5 V, 1 A
      More Composite Video Inputs 2 vs 3 (1 front)
      Speaker A/B vs Zone B
      ONKYO-RI System Control vs
      Independent Power Supply vs 2
      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-NR686 Onkyo TX-SR444
        Dolby Atmos
        DSD via HDMI 2-ch/Multi-ch Input 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ with AccuReflex™ AccuEQ Advance
        New HDCP Version2.22.2
        Analog To HDMI Upconversion Component**, Composite Component**, Composite
        Bluetooth SBC, AAC
        Many RCA Line Inputs7 (1 Front)7 (1 front)
        Composite Video Inputs23 (1 front)
        Component Video Inputs22
        Analog Tuner FM/AM FM/AM
      WEAKNESSES Onkyo TX-NR686 Onkyo TX-SR444
        No Front Wide Channel Support
        No Dolby Atmos Height Virtualization
        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 4K/60p (RGB/YCbCr4:4:4/YCbCr4:2:2, 24 bit)
        Does not Work with Amazon Alexa
        Few 8K Inputs
        No RCA Pre-Outs0.20.1
        No Digital Radio

      6. Amplifier

      Onkyo TX-NR686 Onkyo TX-SR444

      7 channel Linear Class A/B Amplifier: Onkyo TX-NR686 features 7 channel power amplifier with Linear Class A/B design. It is rated at 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.

      7 channel Amplifier: Onkyo TX-SR444 features 7 channel power amplifier. It is rated at 65 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).
      • Dynamic Audio Amplification: Onkyo TX-NR686 features Dynamic Audio Amplification which is Onkyo’s amplification philosophy that focuses on capturing the energy and dynamism contained in the audio signal and reproducing it without loss. Audio signals are not static like a test tone, but rather a countless collection of constantly moving waves. While static measurements such as S/N ratio and Total Harmonic Distortion are important, Onkyo believes that excellent dynamic and transient response is the key to emotionally involving sound. Dynamism - the “life” in music - is achieved when the amp can respond to changes in the signal instantaneously, so notes start and stop naturally and the nuances in attack, decay, sustain, and release are voiced with conviction. Onkyo home theater receivers represent the culmination of almost 70 years’ experience in amplifier design. The unique elements of their amplification system comprise high-current, low-impedance architecture to accurately control large speaker cones while enabling instantaneous response to dynamic changes, and discrete wide-range amplifier circuit topology to eliminate phase shift for clear and accurate audio imaging.
      • WRAT (Wide Range Amp Technology): Onkyo TX-SR444 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™ (previously known as Select2) certification

      Onkyo TX-NR686 is THX™ Select™ (previously known as Select2) certified. This means that it is for medium sized rooms, up to 2,000 cubic feet in size, with a 10-12 foot viewing distance from the screen.

      AMPLIFIER Onkyo TX-NR686 Onkyo TX-SR444
      Channels7.27.1
      Power Output100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)65 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Front Wide Channel Support
      VLSC (Vector Linear Shaping Circuitry) Front L/R channels
      Optimum Gain Volume Circuitry
      THX™ Certification Select™ (previously known as Select2)
      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-NR686
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      7. Speaker Configurations

      Onkyo TX-NR686's and Onkyo TX-SR444's amplifiers can be assigned for different speaker configurations.

      • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
      • Onkyo TX-NR686: 5.2.2 with internal amplifier.
      • Onkyo TX-SR444: 5.1.2 with internal amplifier.
      • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
      • Onkyo TX-NR686: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2 with internal amplifier.
      • Onkyo TX-SR444: Not supported.
      • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
      • Onkyo TX-NR686: 5.2, 7.2 with internal amplifier.
      • Onkyo TX-SR444: 5.1, 7.1 with internal amplifier.
      • Bi-Amp: Onkyo TX-NR686 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-NR686 and Onkyo TX-SR444 support Dolby Atmos.

      • Dolby Surround Upmixer: Both models support 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.

      DTS:X

      Onkyo TX-NR686 supports DTS:X.

      • DTS Neural:X: Onkyo TX-NR686 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 Dialog Control: Onkyo TX-NR686 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-NR686 Onkyo TX-SR444
      Dolby Atmos
      Dolby Atmos Height Virtualization
      Dolby Atmos Music
      Dolby TrueHD
      Dolby Digital Plus
      Dolby Surround Upmixer
      Dolby Pro Logic
      DTS:X
      DTS Neural:X
      DTS Virtual:X
      DTS Neo Neo:6
      DTS-HD Master Audio
      DTS-HD High Resolution Audio
      DTS 96/24
      DTS Express
      DTS-ES
      IMAX Enhanced
      Auro 3D with Auro-Matic Upmixer

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      Onkyo TX-SR444
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      9. HDMI

      Onkyo TX-NR686 comes with 7 HDMI inputs. It has 2 outputs which work parallelly and output the same signal.

      Onkyo TX-SR444 comes with 4 HDMI inputs. It has 1 output.

      • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K/60p (RGB/YCbCr4:4:4) video signal.
      • Analog To HDMI Upconversion: Both receivers support 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-NR686 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-NR686 supports HDR10, Dolby Vision and Hybrid Log-Gamma.

      Onkyo TX-SR444 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-NR686 Onkyo TX-SR444
      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 (RGB/YCbCr4:4:4)up to 4K/60p (RGB/YCbCr4:4:4/YCbCr4:2:2, 24 bit)
      Video Signal Upscaling

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      Onkyo TX-NR686
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      10. Inputs and Outputs

      Audio

      • Phono Input: There is an MM phono input on Onkyo TX-NR686 with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
      • Analog Line Inputs: There are 7 pair of line inputs on both receivers for connecting sources with analog outputs.
      • Digital Inputs: 2 optical inputs and 1 coaxial input are available for digital audio connections on both receivers.
      • Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel of each receiver.

      Video

      • HDMI:
      • Onkyo TX-NR686
        Inputs:         7 (1 front)   Outputs: 2 (simultaneous)
        8K Inputs: 0.
      • Onkyo TX-SR444
        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-NR686
        Inputs:         2   Outputs: 0.
      • Onkyo TX-SR444
        Inputs:         3   Outputs: 0.
      • 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. Both receivers support up to 480i/576i resolution on Component video connectors.
      • Onkyo TX-NR686
        Inputs:         2   Outputs: 0.
      • Onkyo TX-SR444
        Inputs:         2   Outputs: 0.

      Front A/V Inputs

      • Onkyo TX-NR686: HDMI, Mini-Jack
      • Onkyo TX-SR444: Composite Video, RCA Audio

      Onkyo TX-NR686

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      Onkyo TX-SR444

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      TERMINALS Onkyo TX-NR686 Onkyo TX-SR444
      HDMI Inputs7 (1 front)4
      HDMI Outputs2 (simultaneous)1
      8K Inputs
      USB Input1 (Rear)
      USB DC Out Port 5 V, 1 A
      Optical Inputs22
      Optical Outputs
      Coaxial Inputs11
      RCA Line Inputs7 (1 Front)7 (1 front)
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.1
      XLR Pre-outs
      Composite Video Inputs23 (1 front)
      Composite Video Outputs
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs22
      Component Video Outputs

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      Onkyo TX-SR444
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      11. Evaluations

      We evaluated Onkyo TX-NR686 and Onkyo TX-SR444 and gave them scores of 88 and 71 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-NR686

      Onkyo TX-SR444

      OVERALL
      88
      OVERALL
      71

      Amplifier

      EXCELLENT
      89
      •   7.2 Channels
      •   Power Output - 100 W
      •   THX™ Certification
      GOOD
      73
      •   7.1 Channels
      •   Low Power Output - 65 W
      •   Independent Power Supply

      Audio Features

      EXCELLENT
      86
      •   7.2 Channels
      •   No Front Wide Channel Support
      •   7.1 Channel Processing
      •   Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   DSD via HDMI
      GOOD
      78
      •   7.1 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
      94
      •   HDR10
      •   No HDR10+
      •   Dolby Vision
      •   No 8K Passthrough
      •   Analog To HDMI Upconversion
      AVERAGE
      67
      •   No HDR10
      •   No HDR10+
      •   No Dolby Vision
      •   No 8K Passthrough
      •   Analog To HDMI Upconversion

      Connectivity

      EXCELLENT
      85
      •   No eARC
      •   New HDCP Version
      •   Wi-Fi
      •   Bluetooth
      •   Does not Work with Amazon Alexa
      •   Chromecast Built-In
      •   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 4․1 + LE
      AVERAGE
      64
      •   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
      •   Many RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   No Ethernet
      •   Bluetooth 2․1 + EDR

      Zones

      GOOD
      77
      •   2 Zones
      GOOD
      77
      •   2 Zones

      Radio

      EXCELLENT
      92
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Tidal
      AVERAGE
      59
      •   Analog Tuner
      •   No Pandora
      •   No Spotify
      •   No Tidal

      12. Specifications

      GENERAL Onkyo TX-NR686 Onkyo TX-SR444
      BrandOnkyoOnkyo
      ModelTX-NR686TX-SR444
      TypeA/V ReceiverA/V Receiver
      CountryNorth AmericaUSA
      Release Year20182015
      PredecessorOnkyo TX-NR676
      SuccessorOnkyo TX-NR696
      AMPLIFIER Onkyo TX-NR686 Onkyo TX-SR444
      Channels7.27.1
      Power Output100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)65 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Front Wide Channel Support
      Amplifier DesignLinear Class A/B
      Dynamic Audio Amplification
      Non-Phase Shift Amplifier
      WRAT (Wide Range Amplifier Technology)
      VLSC (Vector Linear Shaping Circuitry) Front L/R channels
      Optimum Gain Volume Circuitry
      THX™ Certification Select™ (previously known as Select2)
      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-NR686 Onkyo TX-SR444
      Digital Signal Processing (DSP) Engine32-bit Digital Signal Processing EnginesAdvanced 32-bit DSP Chip
      DACAKM AK4458Burr-Brown
      DAC Specs384 kHz/32 Bit192 kHz/24 Bit
      Maximum Channel Processing7.17.1
      Air Studios Monitor Certification
      Dolby Atmos
      Dolby Atmos Height Virtualization
      Dolby Atmos Music
      Dolby TrueHD
      Dolby Digital Plus
      Dolby Surround Upmixer
      Dolby Pro Logic
      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
      IMAX Enhanced
      Auro 3D with Auro-Matic Upmixer
      PCM 2-ch/Multi-ch Input 2-ch/Multi-ch Input
      Network Audio FormatsFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, MPEG-4 AAC, LPCM
      Music Playback via USBFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, AAC, Dolby TrueHD
      High Resolution Music Playback via USB and/or Network up to 192 kHz
      High Resolution Audio Formats via USBFLAC, WAV, Apple Lossless, DSD, AIFF, AAC, Dolby TrueHD
      Gapless Playback
      DSD via HDMI 2-ch/Multi-ch Input 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 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 (bluetooth included) 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) T-D (Theater-Dimensional)
      Independent Subwoofer Outputs
      CALIBRATION Onkyo TX-NR686 Onkyo TX-SR444
      Auto Speaker Calibration System with Mic. AccuEQ with AccuReflex™ AccuEQ Advance
      VIDEO FEATURES Onkyo TX-NR686 Onkyo TX-SR444
      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 (RGB/YCbCr4:4:4)up to 4K/60p (RGB/YCbCr4:4:4/YCbCr4:2:2, 24 bit)
      Video Signal Upscaling
      Analog To HDMI Upconversion Component**, Composite Component**, Composite
      Component Video Upscaling
      Analog to Analog Video conversion
      Component Video Maximum Resolution480i/576i480i/576i
      isf Certified Calibration Control
      CONNECTIVITY Onkyo TX-NR686 Onkyo TX-SR444
      Wi-Fi
      Bluetooth SBC, AAC
      Works with Amazon Alexa
      Chromecast Built-In
      Works with SonoS requires firmware update & Sonos Connect
      DTS Play-Fi
      MHL Input
      DLNA 1.5
      AirPlay AirPlay 2 after firmware update
      Apple Product Connection iPod, iPhone and iPad iPod, iPhone via RI Dock
      Remote AppOnkyo Remote App for iPod touch/iPhone and Android-Powered Devices
      InstaPrevue Input Source Prevue
      TERMINALS Onkyo TX-NR686 Onkyo TX-SR444
      HDMI Inputs7 (1 front)4
      HDMI Outputs2 (simultaneous)1
      8K Inputs
      USB Input1 (Rear)
      USB DC Out Port 5 V, 1 A
      Optical Inputs22
      Optical Outputs
      Coaxial Inputs11
      RCA Line Inputs7 (1 Front)7 (1 front)
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.20.1
      XLR Pre-outs
      Composite Video Inputs23 (1 front)
      Composite Video Outputs
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs22
      Component Video Outputs
      Ethernet
      Ethernet Switch
      PC In
      Front A/V InputsHDMI, Mini-JackComposite Video, RCA Audio
      Speaker A/B Zone B
      Headphone Out6.3 mm (1/4")6.3 mm (1/4")
      Detachable Power Cord
      uport
      ZONES Onkyo TX-NR686 Onkyo TX-SR444
      Number of Zones22
      Powered Zones 2 2
      Zone 2 OutsRCA Line Out
      Whole House Mode
      RS-232C Interface
      +12V Trigger Output00
      Remote (IR) Input/Output0 / 00 / 0
      MISCELLANEOUS Onkyo TX-NR686 Onkyo TX-SR444
      On-Screen Display Graphical Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up Graphical Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up
      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
      Smart Grid-Ready
      RADIO Onkyo TX-NR686 Onkyo TX-SR444
      Analog Tuner FM/AM FM/AM
      Presets4040
      Digital Radio
      Internet Radio TuneIn
      Pandora
      Spotify
      Tidal
      Deezer
      Napster
      SiriusXM
      CONSTRUCTION Onkyo TX-NR686 Onkyo TX-SR444
      Solid Aluminum Front
      Speaker Terminals99
      Large Speaker Terminals92
      Color-Coded Speaker Terminals
      Transparent High-Grade Speaker Terminals
      Gold plated RCA terminals
      POWER Onkyo TX-NR686 Onkyo TX-SR444
      Power SupplyAC 120 V, 60 HzAC 120 V, 60 Hz
      Independent Power Supply2
      H.C.P.S. (High Current Power Supply) Customized Transformer Massive High Power Transformer
      Toroidal Transformer
      Power Consumption580 W4.3 A
      No Sound Power60 W55 W
      Standby Power0.15 W0.15 W
      ECO Mode / Hybrid Standby Function
      PHYSICAL Onkyo TX-NR686 Onkyo TX-SR444
      Dimensions (W x H x D)435 mm x 173.5 mm x 379.5 mm
      17-1/8" x 6-13/16" x 14-15/16"      		435 mm x 160 mm x 328 mm
      17-1/8" x 6-5/16" x 12-15/16"
      Weight10.0 kg (22.0 lbs)7.8 kg (17.2 lbs)
      SPECIFICATIONS Onkyo TX-NR686 Onkyo TX-SR444
      Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)100 W (0.08% THD)65 W (0.7% THD)
      Power Output (6 Ω, 1 kHz, 1 channel driven, FTC)115 W (0.9% THD)
      Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)210 W (10% THD)120 W
      Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)100 W (1% THD)
      Dynamic Power per Channel (3 Ω, Front)240 W160 W
      Dynamic Power per Channel (4 Ω, Front)210 W125 W
      Dynamic Power per Channel (8 Ω, Front)120 W85 W
      THD0.08% (20 Hz - 20 kHz, Half power)0.08% (20 Hz - 20 kHz, half power)
      Damping Factor40 (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, 1 kHz 100 W/8 Ω)
      Input Sensitivity and Impedance (Phono MM)3.5 mV/47 kΩ
      Rated Headphone Power Output80 mW (32 Ω, 1 kHz, 10% THD)
      Phono Overload70 mV (MM, 1 kHz 0.5%)
      S/N Ratio (Line, IHF-A)106 dB100 dB
      S/N Ratio (Phono MM, IHF-A)80 dB
      Frequency Response (Analog In)10 Hz - 100 kHz/+1 dB, -3 dB (Direct)10 Hz - 100 kHz/+1 dB, -3 dB (Direct mode)
      DSD Sampling Rates via HDMI2.8 MHz
      DSD Sampling Rates via USB2.8 MHz, 5.6 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)      		1 Vp-p/75 Ω (Component Y)
      0.7 Vp-p/75 Ω (Component PB/CB, PR/CR)
      1 Vp-p/75 Ω (Composite)
      Ethernet Standard10BASE-T/100BASE-TX
      Wi-Fi StandardIEEE 802.11 a/b/g/n
      Wi-Fi Terminal Frequency5 GHz, 2.4 GHz
      Bluetooth Version4․1 + LE2․1 + EDR
      Bluetooth Frequency2.4 GHz2.4 GHz
      USB TerminalVer. 2.0, 5 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: 1.56 µV (15.0 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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