Denon AVR-S640H vs Yamaha RX-A680

      Denon AVR-S640H

      Yamaha RX-A680
      80
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      84
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      USA
      USA and Canada UK, Europe, Middle East and Russia
      Australia
      China Asia General
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      Highlights

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

      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 Denon AVR-S640H
      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 Denon AVR-S640H 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. The Denon AVR-S640H has 5 channel and the Yamaha RX-A680 has 7 channel amplifiers.


      Denon AVR-S640H Yamaha RX-A680

      Denon AVR-S640H was introduced in 2018. It is equipped with 5 channel amplifier with 75 W (8 Ω, 20 Hz - 20 kHz and 2 channel driven) power per channel and is capable of 5.1 maximum channel processing. It , passes 4K/60Hz video signal.

      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 Denon AVR-S640H and Yamaha RX-A680 and gave them scores of 80 and 84 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.

      Denon AVR-S640H

      Yamaha RX-A680

      Amplifier
      84
      Amplifier
      86
      Audio Features
      66
      Audio Features
      85
      Video Features
      94
      Video Features
      95
      Connectivity
      82
      Connectivity
      85
      Zones
      55
      Zones
      55
      Radio
      96
      Radio
      89
      OVERALL
      80
      OVERALL
      84

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

      2. Pros and Cons

      In this section we present pros and cons of Denon AVR-S640H and Yamaha RX-A680.

      PROS

      Denon AVR-S640H

      Yamaha RX-A680

      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Auto Low Latency Mode Pass-through
      •   Wi-Fi
      •   Bluetooth
      •   Works with Amazon Alexa
      •   HEOS
      •   USB Input
      •   Phono Input
      •   Composite Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Tidal
      •   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

      Denon AVR-S640H

      Yamaha RX-A680

      •   Few Channels - 5.2
      •   Low Power Output - 75 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 DSD via HDMI
      •   No HDR10+
      •   No eARC
      •   No 8K Passthrough
      •   1 HDMI Outputs
      •   0 8K Input
      •   Few RCA Line Inputs
      •   No RCA Pre-Outs
      •   No Zones
      •   No Digital Radio
      •   Bluetooth 3․0 + 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

      Denon AVR-S640H

      Yamaha RX-A680

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

      3. Advantage of Denon AVR-S640H

      This section shows those features and specifications which are the reason to choose Denon AVR-S640H over Yamaha RX-A680.

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      Denon AVR-S640H
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      Denon AVR-S640H vs Yamaha RX-A680
      Dolby Pro Logic PLII vs
      Audyssey Dynamic EQ vs
      Audyssey Dynamic Volume vs
      Auto Low Latency Mode Pass-through vs
      More HDMI Inputs 5 vs 4
      More Optical Inputs 2 vs 1
      Analog Tuner FM/AM vs FM
      Pandora vs
      Color-Coded Speaker Terminals vs
      Bigger Power Supply 340 W vs 260 W
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 150 W (10% THD) vs 135 W (10% THD)
      Higher FM S/N Ratio Mono/Stereo: 70 dB/67 dB vs Mono/Stereo: 65 dB/64 dB

      4. Advantage of Yamaha RX-A680

      This section shows those features and specifications which are the reason to choose Yamaha RX-A680 over Denon AVR-S640H.

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      Yamaha RX-A680
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      Denon AVR-S640H vs Yamaha RX-A680
      More Channels 5.2 vs 7.2
      Higher Power Output 75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) vs 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Bi-amp capability vs
      Higher DAC Specs 192 kHz/24 Bit vs 384 kHz/32 Bit
      More Channel Processing 5.1 vs 7.1
      Dolby Atmos vs
      Dolby Surround Upmixer vs
      DTS:X vs
      DTS Neural:X vs
      DTS-ES vs Discrete 6.1, Matrix 6.1
      Network Audio Formats MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, DSD vs MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
      Music Playback via USB MP3, WMA, AAC, Apple Lossless, WAV, FLAC, DSD vs MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
      Higher Resolution Music Playback via USB up to 192 kHz vs up to 192 kHz/32 Bit
      High Resolution Audio Formats via USB Apple Lossless, WAV, FLAC, DSD vs Apple Lossless, WAV, FLAC, AIFF, DSD
      DSD via HDMI vs 2-ch/Multi-ch Input
      DTS Dialog Control vs
      Dialog Level Adjustment vs
      Dialogue Lift 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
      More Coaxial Inputs/Outputs 1 vs 2
      More RCA Line Inputs 2 vs 4 (1 front)
      More Composite Video Inputs 2 vs 3
      Front A/V Inputs USB vs USB, mini-jack Audio
      Digital Radio vs DAB/DAB+
      More Speaker Terminals 5 vs 7
      More Large Speaker Terminals 5 vs 7
      Higher S/N Ratio (Line, IHF-A) 98 dB vs 110 dB
      Higher S/N Ratio (Phono MM, IHF-A) 74 dB vs 93 dB
      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 a/b/g/n vs IEEE 802.11 a/b/g/n/ac
      Newer Bluetooth Version 3․0 + EDR vs 4․2
      Lower FM Harmonic Distortion (IHF, 1 kHz) Mono/Stereo: 0.7%/1.0% vs Mono/Stereo: 0.5%/0.6%

      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 Denon AVR-S640H Yamaha RX-A680
        Auto Speaker Calibration System with Mic. Audyssey MultEQ YPAO sound optimization
        HDR10
        Dolby Vision
        New HDCP Version2.22.3
        Wi-Fi
        Bluetooth SBC SBC, AAC
        Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)
        USB Input1 Front for USB memoryUSB memory, Portable Audio Player
        Phono Input
        Composite Video Inputs23
        Ethernet
        Analog Tuner FM/AM FM
        Spotify
        Tidal
      WEAKNESSES Denon AVR-S640H Yamaha RX-A680
        Low Power Output75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        No Dolby Atmos Height Virtualization
        No IMAX Enhanced
        No Auro 3D with Auro-Matic Upmixer
        No HDR10+
        No 8K Passthroughup to 4K 50/60Hz 4:4:4up to 4K/60p 4:4:4
        Few HDMI Outputs11
        Few 8K Inputs
        No RCA Pre-Outs0.20.2
        No Zones11

      6. Amplifier

      Denon AVR-S640H Yamaha RX-A680

      5 channel Amplifier: Denon AVR-S640H features 5 channel power amplifier. It is rated at 75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.

      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 Denon AVR-S640H Yamaha RX-A680
        Channels5.27.2
        Power Output75 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        THX™ Certification
        Continuous 6 Ω Rated
        Certified 4 Ω Performance
        Bi-amp Capability

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        Denon AVR-S640H
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        7. Speaker Configurations

        Denon AVR-S640H'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:
        • Denon AVR-S640H: Not supported.
        • Yamaha RX-A680: 5.2.2 with internal amplifier.
        • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
        • Denon AVR-S640H: Not supported.
        • 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:
        • Denon AVR-S640H: 5.2 with internal amplifier.
        • Yamaha RX-A680: 5.2, 7.2 with internal amplifier.
        • Bi-Amp: Yamaha RX-A680 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

        Yamaha RX-A680 supports Dolby Atmos.

        • Dolby Surround Upmixer: Yamaha RX-A680 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.

        DTS:X

        Yamaha RX-A680 supports DTS:X.

        • DTS Neural:X: Yamaha RX-A680 features 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: Yamaha RX-A680 has 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 Denon AVR-S640H Yamaha RX-A680
        Dolby Atmos
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic PLII
        Dolby Digital EX
        DTS:X
        DTS Neural:X
        DTS Virtual:X
        DTS Neo Neo:6 Neo:6
        DTS-HD Master Audio
        DTS-HD High Resolution Audio
        DTS 96/24
        DTS Express
        DTS-ES Discrete 6.1, Matrix 6.1
        IMAX Enhanced
        Auro 3D with Auro-Matic Upmixer

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        Yamaha RX-A680
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        9. HDMI

        Denon AVR-S640H comes with 5 HDMI inputs. It has 1 output.

        Yamaha RX-A680 comes with 4 HDMI inputs. It has 1 output.

        • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K 50/60Hz 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: Denon AVR-S640H 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)

        Both receivers support 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.


        Gaming Features

        Denon AVR-S640H supports Auto Low Latency Mode (ALLM) for lag-free and smooth gaming.



        VIDEO FEATURES Denon AVR-S640H 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 50/60Hz 4:4:4up to 4K/60p 4:4:4
        Video Signal Upscaling up to 4K 60p 4:4:4

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        Denon AVR-S640H
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        10. Inputs and Outputs

        Audio

        • Phono Input: There is an MM phono input on Denon AVR-S640H and 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 2 pair of line inputs on Denon AVR-S640H and 4 pair of line inputs on Yamaha RX-A680 for connecting sources with analog outputs.
        • Digital Inputs: 2 optical inputs and 1 coaxial input are available on Denon AVR-S640H and 1 optical input and 2 coaxial inputs are available on Yamaha RX-A680 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:
        • Denon AVR-S640H
          Inputs:           5   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.
        • Denon AVR-S640H
          Inputs:           2   Outputs: 1.
        • Yamaha RX-A680
          Inputs:           3   Outputs: 1.

        Front A/V Inputs

        • Denon AVR-S640H: USB
        • Yamaha RX-A680: USB, mini-jack Audio

        Denon AVR-S640H

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        Yamaha RX-A680

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        TERMINALS Denon AVR-S640H Yamaha RX-A680
        HDMI Inputs54
        HDMI Outputs11
        8K Inputs
        USB Input1 Front for USB memoryUSB memory, Portable Audio Player
        USB DC Out Port
        Optical Inputs21
        Optical Outputs
        Coaxial Inputs12
        RCA Line Inputs24 (1 front)
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.20.2
        XLR Pre-outs
        Composite Video Inputs23
        Composite Video Outputs11
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs
        Component Video Outputs

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        Yamaha RX-A680
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        11. Evaluations

        We evaluated Denon AVR-S640H and Yamaha RX-A680 and gave them scores of 80 and 84 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.


        Denon AVR-S640H

        Yamaha RX-A680

        OVERALL
        80
        OVERALL
        84

        Amplifier

        GOOD
        84
        •   Few Channels - 5.2
        •   Low Power Output - 75 W
        EXCELLENT
        86
        •   7.2 Channels
        •   Low Power Output - 80 W

        Audio Features

        AVERAGE
        66
        •   Few Channels - 5.2
        •   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 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

        EXCELLENT
        94
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   Auto Low Latency Mode Pass-through
        •   No 8K Passthrough
        EXCELLENT
        95
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   No 8K Passthrough

        Connectivity

        GOOD
        82
        •   No eARC
        •   New HDCP Version
        •   Wi-Fi
        •   Bluetooth
        •   Works with Amazon Alexa
        •   HEOS
        •   5 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   Few RCA Line Inputs
        •   Phono Input
        •   No RCA Pre-Outs
        •   Composite Video Inputs
        •   Ethernet
        •   Bluetooth 3․0 + 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

        EXCELLENT
        96
        •   Analog Tuner
        •   Pandora
        •   Spotify
        •   Tidal
        EXCELLENT
        89
        •   Analog Tuner
        •   No Pandora
        •   Spotify
        •   Tidal

        12. Specifications

        GENERAL Denon AVR-S640H Yamaha RX-A680
        BrandDenonYamaha
        SeriesAventage
        ModelAVR-S640HRX-A680
        TypeA/V ReceiverA/V Receiver
        CountryUSAAustralia
        Release Year20182018
        PredecessorYamaha RX-A670
        SuccessorDenon AVR-S650H
        AMPLIFIER Denon AVR-S640H Yamaha RX-A680
        Channels5.27.2
        Power Output75 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
        Discrete Amplification
        THX™ Certification
        Continuous 6 Ω Rated
        Certified 4 Ω Performance
        Mono Block Power Amplifier Construction
        Bi-amp Capability
        AUDIO FEATURES Denon AVR-S640H Yamaha RX-A680
        Surround:AI™
        DACBurr-Brown DAC x 4 for main zone
        DAC Specs192 kHz/24 Bit384 kHz/32 Bit
        Maximum Channel Processing5.17.1
        D.D.S.C. HD Digital
        Alpha Processing
        Air Studios Monitor Certification
        Dolby Atmos
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic PLII
        Dolby Digital EX
        Surround EX
        DTS:X
        DTS Neural:X
        DTS Virtual:X
        DTS Neo Neo:6 Neo:6
        DTS-HD Master Audio
        DTS-HD High Resolution Audio
        DTS 96/24
        DTS Express
        DTS-ES Discrete 6.1, Matrix 6.1
        IMAX Enhanced
        Auro 3D with Auro-Matic Upmixer
        PCM 2-ch/Multi-ch Input 2-ch/Multi-ch Input
        Network Audio FormatsMP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, DSDMP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
        Music Playback via USBMP3, WMA, AAC, Apple Lossless, WAV, FLAC, 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, DSDApple Lossless, WAV, FLAC, AIFF, DSD
        Gapless Playback
        DSD via HDMI 2-ch/Multi-ch Input
        DSD via USB 2-ch Input 2-ch Input
        DSD to PCM Converter
        USB DAC
        Jitter Reduction
        DTS Dialogue Control
        Dialog Enhancement
        Dialog Level Adjustment
        Dialog normalization
        Dialogue Lift
        Compressed Music Enhancer
        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
        Pure Direct Mode
        CINEMA DSP 3D
        DSP Programs17
        SILENT CINEMA / Virtual CINEMA DSP Virtual CINEMA FRONT
        Virtual Speakers including surround back
        Independent Subwoofer Outputs
        CALIBRATION Denon AVR-S640H Yamaha RX-A680
        Auto Speaker Calibration System with Mic. Audyssey MultEQ YPAO sound optimization
        YPAO Volume
        PEQ for SUBDown to 31 Hz
        Optimized Bass Redirection
        Bass Sync
        VIDEO FEATURES Denon AVR-S640H 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 50/60Hz 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
        isf Certified Calibration Control
        CONNECTIVITY Denon AVR-S640H Yamaha RX-A680
        Wi-Fi
        Bluetooth SBC SBC, AAC
        Bluetooth Headphone Transmission
        Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)
        Google Assistant
        Chromecast Built-In
        Works with SonoS
        HEOS
        DTS Play-Fi
        MHL Input
        MusicCast
        AirPlay AirPlay 2 AirPlay 2 via firmware update
        Apple Product Connection iPod, iPhone and iPad iPod, iPhone and iPad
        Remote App Denon 2016 AVR Remote App for iOS and Android devices and Kindle Fire (iPhone® / iPad® / Android™ phone / tablet)
        InstaPrevue Input Source Prevue
        TERMINALS Denon AVR-S640H Yamaha RX-A680
        HDMI Inputs54
        HDMI Outputs11
        8K Inputs
        USB Input1 Front for USB memoryUSB memory, Portable Audio Player
        USB DC Out Port
        Optical Inputs21
        Optical Outputs
        Coaxial Inputs12
        RCA Line Inputs24 (1 front)
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.20.2
        XLR Pre-outs
        Composite Video Inputs23
        Composite Video Outputs11
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs
        Component Video Outputs
        Ethernet
        Ethernet Switch
        PC In
        Front A/V InputsUSBUSB, mini-jack Audio
        Speaker A/B
        Headphone Out6.3 mm (1/4")6.3 mm (1/4")
        Detachable Power Cord
        dockport
        ZONES Denon AVR-S640H 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 Denon AVR-S640H Yamaha RX-A680
        On-Screen Display Hybrid Graphic User Interface color OSD
        GUI Languages3
        SCENESCENE (4 sets)
        Web Control
        Control4 SDDP
        PreAmp Mode
        Display 1 line
        Remote ControllerRC-1226
        Pre-programmed / Learnable / LCD Display / /
        Denon Link HD
        Setup Assistant
        Quick Select plus / Quick Select /
        RADIO Denon AVR-S640H Yamaha RX-A680
        Analog Tuner FM/AM FM
        Presets40
        Digital Radio DAB/DAB+
        Internet Radio TuneIn
        Pandora
        Spotify
        Tidal
        Deezer
        Napster
        SiriusXM
        CONSTRUCTION Denon AVR-S640H Yamaha RX-A680
        Front Panelnot Metal
        A.R.T. Wedge
        Speaker Terminals57
        Large Speaker Terminals57
        Color-Coded Speaker Terminals
        Transparent High-Grade Speaker Terminals
        High Grade Audio Components
        Gold plated RCA terminals
        POWER Denon AVR-S640H Yamaha RX-A680
        Power SupplyAC 120 V, 60 HzAC 240 V, 50 Hz
        Power Consumption340 W260 W
        Standby Power0.1 W0.1 W
        ECO Mode / Hybrid Standby Function
        Auto Power Standby
        Auto Power off
        PHYSICAL Denon AVR-S640H Yamaha RX-A680
        Dimensions (W x H x D)434 mm x 151 mm x 339 mm (with antenna: 434 mm x 215 mm x 339 mm)
        17 1/8" x 6" x 13 3/8" (with antenna: 17 1/8" x 8 1/2" x 13 3/8")        		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")
        Weight7.8 kg (17 lbs 3 oz)8.3 kg (18.3 lbs)
        SPECIFICATIONS Denon AVR-S640H Yamaha RX-A680
        Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)75 W (0.08% THD)
        Power Output (6 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (0.09% THD)
        Power Output (6 Ω, 1 kHz, 2 channel driven, FTC)100 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)150 W (10% THD)135 W (10% THD)
        Dynamic Power per Channel (2 Ω, Front)190 W
        Dynamic Power per Channel (4 Ω, Front)170 W
        Dynamic Power per Channel (6 Ω, Front)140 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)
        Phono Distortion0.03% (1 kHz, 3 V)
        Damping Factor100 (Front, 20 Hz - 20 kHz, 8 Ω)
        Input Sensitivity and Impedance (Line)200 mV/47 kΩ200 mV/47 kΩ (1 kHz, 100 W/6 Ω)
        Input Sensitivity and Impedance (Phono MM)2.5 mV3.5 mV/47 kΩ
        Maximum Input Sensitivity (Line)2.3 V (1 kHz, 0.5% THD)
        Rated Headphone Jack Output Level and Impedance100 mV/470 Ω (1 kHz, 50 mV, 8 Ω)
        S/N Ratio (Line, IHF-A)98 dB110 dB
        S/N Ratio (Phono MM, IHF-A)74 dB93 dB
        Phono RIAA Deviation±1 dB (20-20 kHz)
        Frequency Response (Analog In)+1/-3 dB (10 Hz to 100 kHz, Direct mode)+0/-3 dB (10 Hz to 100 kHz)
        Residual noise (IHF-A Network)150 µV (Speaker Out)
        Channel Separation at 1 kHz/10 kHz (LINE)70 dB/50 dB
        DSD Sampling Rates via HDMI2.8 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-p
        Video Frequency Response5 Hz to 10 MHz, 0 dB/-3 dB (Composite)
        Video S/N Ratio50 dB
        Ethernet Standard100BASE-TX10BASE-T/100BASE-TX
        Wi-Fi StandardIEEE 802.11 a/b/g/nIEEE 802.11 a/b/g/n/ac
        Wi-Fi Terminal Frequency5 GHz, 2.4 GHz2.4 GHz, 5 GHz
        Bluetooth Version3․0 + EDR4․2
        Bluetooth Frequency2.4 GHz2.4 GHz
        USB TerminalUSB2.0 5V, 1 AUSB2.0 5 V, 1 A
        FM Frequency87.5 MHz - 107.9 MHz87.50 MHz - 108.00 MHz
        FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)Mono: 2.8 µV (20.2 dBf)Mono: 3 µV (20.8 dBf)
        FM Effective Sensitivity1.2 µV (12.8 dBf)
        FM S/N RatioMono/Stereo: 70 dB/67 dBMono/Stereo: 65 dB/64 dB
        FM Harmonic Distortion (IHF, 1 kHz)Mono/Stereo: 0.7%/1.0%Mono/Stereo: 0.5%/0.6%
        AM Frequency520 kHz - 1710 kHz
        AM Effective Sensitivity18 µV
        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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