Yamaha RX-A660 vs Yamaha RX-A680

      Yamaha RX-A660

      Yamaha RX-A680
      80
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      85
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      USA and Canada UK and Europe Australia China
      Korea
      Taiwan Asia Brazil and General
      USA and Canada
      UK, Europe, Middle East and Russia
      Australia China Asia General
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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
      • 4K/60Hz Passthrough
      • Wi-Fi, Bluetooth, Ethernet

      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/60Hz Upscaling
      • Wi-Fi, Bluetooth, Ethernet
      • Phono Input

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

      Table of Contents
      1. Overview
      2. Pros and Cons
      3. Advantage of Yamaha RX-A660
      4. Advantage of Yamaha RX-A680
      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 Yamaha RX-A660 to Yamaha RX-A680 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. Both receivers have 7 channel and equally powerful amplifiers.


      Yamaha RX-A660 Yamaha RX-A680

      Yamaha RX-A660 was introduced in 2016. 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 video signal.

      Yamaha RX-A680 was introduced in 2018. 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 up to 4K 60p 4:4:4 video signal.

      We evaluated Yamaha RX-A660 and Yamaha RX-A680 and gave them scores of 80 and 85 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.

      Yamaha RX-A660

      Yamaha RX-A680

      Amplifier
      83
      Amplifier
      86
      Audio Features
      84
      Audio Features
      85
      Video Features
      84
      Video Features
      95
      Connectivity
      79
      Connectivity
      85
      Zones
      55
      Zones
      55
      Radio
      79
      Radio
      91
      OVERALL
      80
      OVERALL
      85

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

      2. Pros and Cons

      In this section we present pros and cons of Yamaha RX-A660 and Yamaha RX-A680.

      PROS

      Yamaha RX-A660

      Yamaha RX-A680

      •   Dolby Atmos
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   New HDCP Version
      •   Wi-Fi
      •   Bluetooth
      •   Works with Amazon Alexa
      •   USB Input
      •   Composite Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Spotify
      •   Dolby Atmos
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   eARC
      •   New HDCP Version
      •   Wi-Fi
      •   Bluetooth
      •   Works with Amazon Alexa
      •   Google Assistant
      •   USB Input
      •   Phono Input
      •   Composite Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Digital Radio
      •   Spotify
      •   Tidal

      CONS

      Yamaha RX-A660

      Yamaha RX-A680

      •   Low Power Output - 80 W
      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No Dolby Vision
      •   No eARC
      •   No 8K Passthrough
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Zones
      •   No Digital Radio
      •   No Pandora
      •   No Tidal
      •   Bluetooth 2․1 + EDR
      •   Low Power Output - 80 W
      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No 8K Passthrough
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   No RCA Pre-Outs
      •   No Zones
      •   No Pandora


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

      AVERAGE

      Yamaha RX-A660

      Yamaha RX-A680

      •   7.2 Channels
      •   7.1 Channel Processing
      •   RCA Line Inputs
      •   7.2 Channels
      •   7.1 Channel Processing
      •   RCA Line Inputs
      •   Bluetooth 4․2

      3. Advantage of Yamaha RX-A660

      This section shows those features and specifications which are the reason to choose Yamaha RX-A660 over Yamaha RX-A680.

      Check the Price

      Yamaha RX-A660
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      Yamaha RX-A660 vs Yamaha RX-A680
      More Composite Video Inputs 4 vs 3
      Analog Tuner FM/AM vs FM with RDS
      Better Channel Separation at 1 kHz/10 kHz (LINE) 75 dB/50 dB vs 70 dB/50 dB

      4. Advantage of Yamaha RX-A680

      This section shows those features and specifications which are the reason to choose Yamaha RX-A680 over Yamaha RX-A660.

      Check the Price

      Yamaha RX-A680
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      Yamaha RX-A660 vs Yamaha RX-A680
      Higher DAC Specs 192 kHz/24 Bit vs 384 kHz/32 Bit
      Higher Resolution Music Playback via USB up to 192 kHz vs up to 192 kHz/32 Bit
      Dialog Normalization vs
      YPAO Volume vs
      Dolby Vision vs
      HLG vs
      Enhanced Audio Return Channel (eARC) vs via future firmware update
      Newer HDCP Version 2.2 vs 2.3
      Video Signal Upscaling vs up to 4K 60p 4:4:4
      AirPlay AirPlay vs AirPlay 2 via firmware update
      Phono Input vs
      Web Control vs
      Digital Radio vs DAB/DAB+
      Tidal vs
      Deezer vs
      Napster vs
      SiriusXM vs
      Higher DSD Sampling Rate via USB 5.6 MHz, 2.8 MHz vs 11.2 MHz, 5.6 MHz, 2.8 MHz
      Wi-Fi Standard IEEE 802.11 b/g/n vs IEEE 802.11 a/b/g/n/ac
      Wi-Fi Terminal Frequency 2.4 GHz vs 2.4 GHz, 5 GHz
      Newer Bluetooth Version 2․1 + EDR vs 4․2

      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 Yamaha RX-A660 Yamaha RX-A680
        Dolby Atmos up to 5.1.2
        DTS:X up to 5.1.2
        DSD via HDMI 2-ch/Multi-ch Input 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. YPAO sound optimization YPAO sound optimization
        HDR10
        New HDCP Version2.22.3
        Wi-Fi with Wireless Direct
        Bluetooth SBC, AAC SBC, AAC
        Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo, Dot, Tap and Show) on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)
        USB InputUSB memory, portable audio playerUSB memory, Portable Audio Player
        Composite Video Inputs43
        Ethernet
        Analog Tuner FM/AM FM with RDS
        Spotify
      WEAKNESSES Yamaha RX-A660 Yamaha RX-A680
        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 Front Wide Channel Support
        No Dolby Atmos Height Virtualization
        No IMAX Enhanced
        No Auro 3D with Auro-Matic Upmixer
        No HDR10+
        No 8K Passthroughup to 4K/60p 4:4:4up to 4K/60p 4:4:4
        Few HDMI Inputs44
        Few HDMI Outputs11
        Few 8K Inputs
        No RCA Pre-Outs0.20.2
        No Zones11
        No Pandora

      6. Amplifier

      Yamaha RX-A660 Yamaha RX-A680

      7 channel Amplifier: Yamaha RX-A660 features 7 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).

      7 channel Amplifier: Yamaha RX-A680 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.


        AMPLIFIER Yamaha RX-A660 Yamaha RX-A680
        Channels7.27.2
        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
        THX™ Certification
        Continuous 6 Ω Rated
        Bi-amp Capability

        Check the Price

        Yamaha RX-A660
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        7. Speaker Configurations

        Yamaha RX-A660's and Yamaha RX-A680's amplifiers can be assigned for different speaker configurations.

        • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
        • Yamaha RX-A660: 5.2.2 with internal amplifier.
        • Yamaha RX-A680: 5.2.2 with internal amplifier.
        • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
        • Yamaha RX-A660: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2 with internal amplifier.
        • Yamaha RX-A680: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2 with internal amplifier.
        • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
        • Yamaha RX-A660: 5.2, 7.2 with internal amplifier.
        • Yamaha RX-A680: 5.2, 7.2 with internal amplifier.
        • 2-ch Bi-Amp: Both models are 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

        Yamaha RX-A660 and Yamaha RX-A680 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

        Yamaha RX-A660 and Yamaha RX-A680 support DTS:X.

        • DTS Neural:X: Both models feature 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: Both models have 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 Yamaha RX-A660 Yamaha RX-A680
        Dolby Atmos up to 5.1.2
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic
        Dolby Digital EX
        DTS:X up to 5.1.2
        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 Discrete 6.1, Matrix 6.1
        IMAX Enhanced
        Auro 3D with Auro-Matic Upmixer

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        Yamaha RX-A680
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        9. HDMI

        Yamaha RX-A660 and Yamaha RX-A680 come with 4 HDMI inputs. It has 1 output.

        • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K/60p 4:4:4 video signal.
        • 4K Upscaling on Yamaha RX-A680: It can upscale up to 4K 60p 4:4:4 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 both models).
        • HDCP Copy Protection: Yamaha RX-A660 is HDCP 2.2 and Yamaha RX-A680 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)

        Yamaha RX-A660 supports HDR10

        Yamaha RX-A680 supports HDR10, Dolby Vision and Hybrid Log-Gamma. 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.


        Enhanced Audio Return Channel (eARC)

        Yamaha RX-A680 supports Audio Return Channel (ARC) which allows the compatible TV to send audio signal to the a/v receiver through the same HDMI cable which is used to send audio and video signals to the TV. So one HDMI cable is used to transfer audio signal in both directions. New Enhanced ARC will support uncompressed audio formats such as Dolby Atmos, DTS:X, Dolby TrueHD and DTS HD Master Audio whereas the previous ARC could support only Dolby Digital, Dolby Digital Plus, DTS, DTS HD, and PCM.



        VIDEO FEATURES Yamaha RX-A660 Yamaha RX-A680
        HDR10
        HDR10+
        Dynamic HDR
        BT.2020 color space
        Dolby Vision
        HLG (Hybrid Log Gamma)
        HDBaseT Compatible
        Enhanced Audio Return Channel (eARC) via future firmware update
        HDCP Version2.22.3
        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 4:4:4up to 4K/60p 4:4:4
        Video Signal Upscaling up to 4K 60p 4:4:4

        Check the Price

        Yamaha RX-A660
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        10. Inputs and Outputs

        Audio

        • Phono Input: There is an MM phono input on Yamaha RX-A680 with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
        • Analog Line Inputs: There are 4 pair of line inputs on both receivers for connecting sources with analog outputs.
        • Digital Inputs: 1 optical input and 2 coaxial inputs 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:
        • Yamaha RX-A660
          Inputs:           4   Outputs: 1
          8K Inputs: 0.
        • Yamaha RX-A680
          Inputs:           4   Outputs: 1
          8K Inputs: 0.
        • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
        • Yamaha RX-A660
          Inputs:           4   Outputs: 1.
        • Yamaha RX-A680
          Inputs:           3   Outputs: 1.

        Front A/V Inputs

        • Yamaha RX-A660: USB, mini-jack Audio
        • Yamaha RX-A680: USB, mini-jack Audio

        Yamaha RX-A660

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        Yamaha RX-A680

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        TERMINALS Yamaha RX-A660 Yamaha RX-A680
        HDMI Inputs44
        HDMI Outputs11
        8K Inputs
        USB InputUSB memory, portable audio playerUSB memory, Portable Audio Player
        USB DC Out Port
        Optical Inputs11
        Optical Outputs
        Coaxial Inputs22
        RCA Line Inputs4 (1 front)4 (1 front)
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.20.2
        XLR Pre-outs
        Composite Video Inputs43
        Composite Video Outputs11
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs
        Component Video Outputs

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        Yamaha RX-A680
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        11. Evaluations

        We evaluated Yamaha RX-A660 and Yamaha RX-A680 and gave them scores of 80 and 85 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.


        Yamaha RX-A660

        Yamaha RX-A680

        OVERALL
        80
        OVERALL
        85

        Amplifier

        GOOD
        83
        •   7.2 Channels
        •   Low Power Output - 80 W
        EXCELLENT
        86
        •   7.2 Channels
        •   Low Power Output - 80 W

        Audio Features

        GOOD
        84
        •   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
        EXCELLENT
        85
        •   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

        Video Features

        GOOD
        84
        •   HDR10
        •   No HDR10+
        •   No Dolby Vision
        •   No 8K Passthrough
        EXCELLENT
        95
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   No 8K Passthrough

        Connectivity

        GOOD
        79
        •   No eARC
        •   New HDCP Version
        •   Wi-Fi
        •   Bluetooth
        •   Works with Amazon Alexa
        •   4 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   RCA Line Inputs
        •   No Phono Input
        •   No RCA Pre-Outs
        •   Composite Video Inputs
        •   Ethernet
        •   Bluetooth 2․1 + EDR
        EXCELLENT
        85
        •   eARC
        •   New HDCP Version
        •   Wi-Fi
        •   Bluetooth
        •   Works with Amazon Alexa
        •   Google Assistant
        •   4 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   RCA Line Inputs
        •   Phono Input
        •   No RCA Pre-Outs
        •   Composite Video Inputs
        •   Ethernet
        •   Bluetooth 4․2

        Zones

        AVERAGE
        55
        •   No Zones
        AVERAGE
        55
        •   No Zones

        Radio

        GOOD
        79
        •   Analog Tuner
        •   No Pandora
        •   Spotify
        •   No Tidal
        EXCELLENT
        91
        •   Analog Tuner
        •   No Pandora
        •   Spotify
        •   Tidal

        12. Specifications

        GENERAL Yamaha RX-A660 Yamaha RX-A680
        BrandYamahaYamaha
        SeriesAventageAventage
        ModelRX-A660RX-A680
        TypeA/V ReceiverA/V Receiver
        CountryKoreaUK, Europe, Middle East and Russia
        Release Year20162018
        PredecessorYamaha RX-A550 Yamaha RX-A670
        SuccessorYamaha RX-A670
        AMPLIFIER Yamaha RX-A660 Yamaha RX-A680
        Channels7.27.2
        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
        THX™ Certification
        Continuous 6 Ω Rated
        Certified 4 Ω Performance
        Discrete Output Stage Circuitry
        Bi-amp Capability
        AUDIO FEATURES Yamaha RX-A660 Yamaha RX-A680
        Surround:AI™
        DACBurr-BrownBurr-Brown DAC x 4 for main zone
        DAC Specs192 kHz/24 Bit384 kHz/32 Bit
        Maximum Channel Processing7.17.1
        Air Studios Monitor Certification
        Dolby Atmos up to 5.1.2
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic
        Dolby Digital EX
        DTS:X up to 5.1.2
        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 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
        Network Audio FormatsMP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSDMP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
        Music Playback via USBMP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSDMP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
        High Resolution Music Playback via USB and/or Network up to 192 kHz up to 192 kHz/32 Bit
        High Resolution Audio Formats via USBApple Lossless, WAV, FLAC, AIFF, DSDApple Lossless, WAV, FLAC, AIFF, DSD
        Gapless Playback
        DSD via HDMI 2-ch/Multi-ch Input 2-ch/Multi-ch Input
        DSD via USB 2-ch Input 2-ch Input
        DSD to PCM Converter
        USB DAC
        DTS Dialogue Control
        Dialog Level Adjustment
        Dialog normalization
        Dialogue Lift no presence speakers required
        Compressed Music Enhancer including for Bluetooth®
        High-resolution Music Enhancer
        Adaptive DRC (Dynamic Range Control)
        Initial Volume & Maximum Volume Setting
        Audyssey Dynamic EQ
        Audyssey Dynamic Volume
        Audyssey LFC
        Audyssey Sub EQ HT
        Audyssey DSX
        Direct Mode
        Straight Decoding Mode
        CINEMA DSP 3D 3D
        DSP Programs1717
        SILENT CINEMA / Virtual CINEMA DSP Virtual CINEMA FRONT Virtual CINEMA FRONT
        Virtual Speakers including surround back including surround back
        Independent Subwoofer Outputs
        CALIBRATION Yamaha RX-A660 Yamaha RX-A680
        Auto Speaker Calibration System with Mic. YPAO sound optimization YPAO sound optimization
        YPAO Volume
        PEQ for SUBDown to 31 HzDown to 31 Hz
        VIDEO FEATURES Yamaha RX-A660 Yamaha RX-A680
        HDR10
        HDR10+
        Dynamic HDR
        BT.2020 color space
        Dolby Vision
        HLG (Hybrid Log Gamma)
        HDBaseT Compatible
        Enhanced Audio Return Channel (eARC) via future firmware update
        HDCP Version2.22.3
        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 4:4:4up to 4K/60p 4:4:4
        Video Signal Upscaling up to 4K 60p 4:4:4
        Analog To HDMI Upconversion
        Component Video Upscaling
        Analog to Analog Video conversion
        Video Parameter Adjustments
        isf Certified Calibration Control
        CONNECTIVITY Yamaha RX-A660 Yamaha RX-A680
        Wi-Fi with Wireless Direct
        Bluetooth SBC, AAC SBC, AAC
        Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo, Dot, Tap and Show) on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)
        Google Assistant
        Chromecast Built-In
        Works with SonoS
        DTS Play-Fi
        MHL Input
        DLNA 1.5
        MusicCast
        AirPlay AirPlay AirPlay 2 via firmware update
        Apple Product Connection iPod, iPhone and iPad iPod, iPhone and iPad
        Remote App (iPhone® / iPad® / Android™ phone / tablet) (iPhone® / iPad® / Android™ phone / tablet)
        InstaPrevue Input Source Prevue
        TERMINALS Yamaha RX-A660 Yamaha RX-A680
        HDMI Inputs44
        HDMI Outputs11
        8K Inputs
        USB InputUSB memory, portable audio playerUSB memory, Portable Audio Player
        USB DC Out Port
        Optical Inputs11
        Optical Outputs
        Coaxial Inputs22
        RCA Line Inputs4 (1 front)4 (1 front)
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.20.2
        XLR Pre-outs
        Composite Video Inputs43
        Composite Video Outputs11
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs
        Component Video Outputs
        Ethernet
        Ethernet Switch
        PC In
        Front A/V InputsUSB, mini-jack AudioUSB, mini-jack Audio
        Speaker A/B
        Headphone Out6.3 mm (1/4")6.3 mm (1/4")
        Detachable Power Cord
        dockport
        ZONES Yamaha RX-A660 Yamaha RX-A680
        Number of Zones11
        Zone B Video Output
        RS-232C Interface
        +12V Trigger Output
        Remote (IR) Input/Output0 / 00 / 0
        Party Mode
        MISCELLANEOUS Yamaha RX-A660 Yamaha RX-A680
        On-Screen Display color OSD color OSD
        SCENESCENE (4 sets)SCENE (4 sets)
        Web Control
        PreAmp Mode
        RADIO Yamaha RX-A660 Yamaha RX-A680
        Analog Tuner FM/AM FM with RDS
        Presets4040
        Digital Radio DAB/DAB+
        Internet Radio vTuner
        Pandora
        Spotify
        Tidal
        Deezer
        Napster
        SiriusXM
        CONSTRUCTION Yamaha RX-A660 Yamaha RX-A680
        A.R.T. Wedge
        Speaker Terminals77
        Large Speaker Terminals77
        Color-Coded Speaker Terminals
        Gold plated RCA terminals
        POWER Yamaha RX-A660 Yamaha RX-A680
        Power SupplyAC 220 V, 60 HzAC 230 V, 50 Hz
        Power Consumption260 W260 W
        Standby Power0.1 W0.1 W
        ECO Mode / Hybrid Standby Function
        Auto Power Standby
        PHYSICAL Yamaha RX-A660 Yamaha RX-A680
        Dimensions (W x H x D)435 mm x 161 mm x 330 mm (with antenna: 435 mm x 225.5 mm x 330 mm)435 mm x 161 mm x 330 mm (with antenna: 435 mm x 225.5 mm x 330 mm)
        17-1/8" x 6-3/8" x 13" (with antenna up: 17-1/8" x 8-7/8" x 13")
        Weight8.3 kg (18.3 lbs)8.3 kg (18.3 lbs)
        SPECIFICATIONS Yamaha RX-A660 Yamaha RX-A680
        Power Output (6 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (0.09% THD)80 W (0.09% THD)
        Power Output (6 Ω, 1 kHz, 1 channel driven, FTC)115 W (0.9% THD)115 W (0.9% THD)
        Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)135 W (10% THD)135 W (10% THD)
        Dynamic Power per Channel (2 Ω, Front)190 W190 W
        Dynamic Power per Channel (4 Ω, Front)170 W170 W
        Dynamic Power per Channel (6 Ω, Front)140 W140 W
        Dynamic Power per Channel (8 Ω, Front)120 W
        THD (Phono)0.02% (Phono to SPEAKER OUT (Front), 20 Hz - 20 kHz, 1 V)
        Damping Factor100 (Front, 20 Hz - 20 kHz, 8 Ω)100 (Front, 20 Hz - 20 kHz, 8 Ω)
        Input Sensitivity and Impedance (Line)200 mV/47 kΩ (1 kHz, 100 W/6 Ω)200 mV/47 kΩ (1 kHz, 100 W/6 Ω)
        Input Sensitivity and Impedance (Phono MM)3.5 mV/47 kΩ
        Maximum Input Sensitivity (Line)2.3 V (1 kHz, 0.5% THD)2.3 V (1 kHz, 0.5% THD)
        Rated Headphone Jack Output Level and Impedance100 mV/470 Ω (1 kHz, 50 mV, 8 Ω)100 mV/470 Ω (1 kHz, 50 mV, 8 Ω)
        S/N Ratio (Line, IHF-A)110 dB110 dB
        S/N Ratio (Phono MM, IHF-A)93 dB
        Frequency Response (Analog In)+0/-3 dB (10 Hz to 100 kHz)+0/-3 dB (10 Hz to 100 kHz)
        Residual noise (IHF-A Network)150 µV (Speaker Out)150 µV (Speaker Out)
        Channel Separation at 1 kHz/10 kHz (LINE)75 dB/50 dB70 dB/50 dB
        DSD Sampling Rates via HDMI2.8 MHz2.8 MHz
        DSD Sampling Rates via USB5.6 MHz, 2.8 MHz11.2 MHz, 5.6 MHz, 2.8 MHz
        Video Input Sensitivity/Output Level and Impedance 1 Vp-p/75 Ω (Composite)1 Vp-p/75 Ω (Composite)
        Video Maximum Input1.5 Vp-p1.5 Vp-p
        Video S/N Ratio50 dB50 dB
        Ethernet Standard10BASE-T/100BASE-TX10BASE-T/100BASE-TX
        Wi-Fi StandardIEEE 802.11 b/g/nIEEE 802.11 a/b/g/n/ac
        Wi-Fi Terminal Frequency2.4 GHz2.4 GHz, 5 GHz
        Bluetooth Version2․1 + EDR4․2
        Bluetooth Frequency2.4 GHz2.4 GHz
        USB TerminalUSB2.0 5 V, 1 AUSB2.0 5 V, 1 A
        FM Frequency87.50 MHz - 108.00 MHz87.50 MHz - 108.00 MHz
        FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)Mono: 3 µV (20.8 dBf)Mono: 3 µV (20.8 dBf)
        FM S/N RatioMono/Stereo: 65 dB/64 dBMono/Stereo: 65 dB/64 dB
        FM Harmonic Distortion (IHF, 1 kHz)Mono/Stereo: 0.5%/0.6%Mono/Stereo: 0.5%/0.6%
        AM Frequency531 kHz - 1611 kHz
        DAB Freq174 MHz - 240 MHz (Band III)
        DAB audio formatsMPEG 1 Layer II/MPEG-4 HE-AAC v2
        Warranty3 Years3 Years

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

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