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    GENERAL Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Brand Yamaha Yamaha Yamaha Yamaha
    Series Aventage Aventage Aventage Aventage
    Model RX-A680 RX-A670 RX-A660 RX-A550
    Type A/V Receiver A/V Receiver A/V Receiver A/V Receiver
    Country USA and Canada USA and Canada USA and Canada USA and Canada
    Release Year 2018 2017 2016 2015
    Predecessor Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550 -
    Successor - Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660
    AMPLIFIER Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Channels 7.2 7.2 7.2 5.1
    Power Output 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) 80 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-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Surround:AI™
    DAC Burr-Brown DAC x 4 for main zone Burr-Brown Burr-Brown Burr-Brown
    DAC Specs 384 kHz/32 Bit 192 kHz/24 Bit 192 kHz/24 Bit 192 kHz/24 Bit
    Maximum Channel Processing 7.1 7.1 7.1 5.1
    Air Studios Monitor Certification
    Dolby Atmos up to 5.1.2 up to 5.1.2
    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 up to 5.1.2 up to 5.1.2
    DTS Neural:X
    DTS Virtual:X
    DTS Neo Neo:6 Neo:6 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 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 2-ch/Multi-ch Input 2-ch/Multi-ch Input
    Network Audio Formats MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
    Music Playback via USB MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
    High Resolution Music Playback via USB and/or Network up to 192 kHz/32 Bit up to 192 kHz up to 192 kHz up to 192 kHz
    High Resolution Audio Formats via USB Apple Lossless, WAV, FLAC, AIFF, DSD Apple Lossless, WAV, FLAC, AIFF, DSD Apple Lossless, WAV, FLAC, AIFF, DSD Apple Lossless, WAV, FLAC, AIFF, DSD
    Gapless Playback
    DSD via HDMI 2-ch/Multi-ch Input 2-ch/Multi-ch Input 2-ch/Multi-ch Input 2-ch/Multi-ch Input
    DSD via USB 2-ch Input 2-ch Input 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 no presence speakers required
    Compressed Music Enhancer including enhancer for Bluetooth® including for Bluetooth® 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 3D 3D
    DSP Programs 17 17 17 17
    SILENT CINEMA / Virtual CINEMA DSP Virtual CINEMA FRONT Virtual CINEMA FRONT Virtual CINEMA FRONT Virtual CINEMA FRONT
    Virtual Speakers including surround back including surround back including surround back
    Independent Subwoofer Outputs -
    CALIBRATION Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Auto Speaker Calibration System with Mic. YPAO sound optimization YPAO sound optimization YPAO sound optimization YPAO sound optimization
    YPAO Volume
    PEQ for SUB Down to 31 Hz Down to 31 Hz Down to 31 Hz Down to 31 Hz
    VIDEO FEATURES Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    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 Version 2.3 2.3 2.2 2.2
    QMS (Quick Media Switching)
    ALLM (Auto Low Latency Mode)
    VRR (Variable Refresh Rate)
    QFT (Quick Frame transport)
    3-D Ready
    Video Signal Passthrough up to 4K/60p 4:4:4 up to 4K/60p 4:4:4 up to 4K/60p 4:4:4 up to 4K/60p 4:2:0
    Video Signal Upscaling up to 4K 60p 4:4:4 up to 4K 60p 4:4:4 up to 1080p
    Analog To HDMI Upconversion
    Component Video Upscaling - -
    Analog to Analog Video conversion
    Component Video Maximum Resolution - - - 1080i
    Video Parameter Adjustments -
    isf Certified Calibration Control
    CONNECTIVITY Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Wi-Fi with Wireless Direct with Wireless Direct with Wireless Direct
    Bluetooth SBC, AAC SBC, AAC SBC, AAC
    Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo or Echo Dot) on MusicCast (Voice control using your Alexa device like Echo or Echo Dot) on MusicCast (Voice control using your Alexa device like Echo, Dot, Tap and Show) on MusicCast (Voice control using your Alexa device like Echo, Dot, Tap and Show)
    Google Assistant - - -
    Chromecast Built-In
    Works with SonoS
    DTS Play-Fi
    MHL Input
    DLNA 1.5 -
    MusicCast
    AirPlay AirPlay 2 via firmware update AirPlay AirPlay AirPlay
    Apple Product Connection iPod, iPhone and iPad iPod, iPhone and iPad iPod, iPhone and iPad iPod, iPhone and iPad
    Remote App (iPhone® / iPad® / Android™ phone / tablet) (iPhone® / iPad® / Android™ phone / tablet) (iPhone® / iPad® / Android™ phone / tablet) (iPhone® / iPad® / Android™ phone / tablet)
    InstaPrevue Input Source Prevue
    TERMINALS Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    HDMI Inputs 4 4 4 6
    HDMI Outputs 1 1 1 1
    8K Inputs
    USB Input USB memory, Portable Audio Player USB memory, portable audio player USB memory, portable audio player iPod® / iPhone®, USB memory, portable audio player
    USB DC Out Port
    Optical Inputs 1 1 1 1
    Optical Outputs
    Coaxial Inputs 2 2 2 2
    RCA Line Inputs 4 (1 front) 4 (1 front) 4 (1 front) 4 (1 AUX Jack in the front)
    RCA Line Outputs
    XLR Line Inputs
    Phono Input
    Multi-Channel Input
    RCA Pre-Outs 0.2 0.2 0.2 0.1
    XLR Pre-outs
    Composite Video Inputs 3 3 4 4
    Composite Video Outputs 1 1 1 1
    S-Video Inputs
    S-Video Outputs
    Component Video Inputs 2
    Component Video Outputs 1
    Ethernet
    Ethernet Switch
    PC In
    Front A/V Inputs USB, mini-jack Audio USB, mini-jack Audio USB, mini-jack Audio USB, mini-jack
    Speaker A/B
    Headphone Out 6.3 mm (1/4") 6.3 mm (1/4") 6.3 mm (1/4") 6.3 mm (1/4")
    Detachable Power Cord
    dockport
    ZONES Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Number of Zones 1 1 1 1
    Zone B Video Output
    Zone GUI - - -
    RS-232C Interface
    +12V Trigger Output
    Remote (IR) Input/Output 0 / 0 0 / 0 0 / 0 0 / 0
    Party Mode
    MISCELLANEOUS Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    On-Screen Display color OSD color OSD color OSD color OSD
    SCENE SCENE (4 sets) SCENE (4 sets) SCENE (4 sets) SCENE (4 sets)
    Web Control
    PreAmp Mode
    RADIO Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Analog Tuner FM/AM FM/AM FM/AM FM/AM
    Presets 40 40 40 40
    Digital Radio
    Internet Radio vTuner vTuner
    Pandora
    Spotify
    Tidal
    Deezer
    Napster
    SiriusXM
    CONSTRUCTION Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    A.R.T. Wedge
    Speaker Terminals 7 7 7 5
    Large Speaker Terminals 7 7 7 5
    Color-Coded Speaker Terminals
    Gold plated RCA terminals
    POWER Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Power Supply AC 120 V, 60 Hz AC 120 V, 60 Hz AC 120 V, 60 Hz AC 120 V, 60 Hz
    Power Consumption 260 W 260 W 260 W 260 W
    Standby Power 0.1 W 0.1 W 0.1 W 0.1 W
    ECO Mode / Hybrid Standby Function
    Auto Power Standby
    PHYSICAL Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    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)
    17-1/8" x 6-3/8" x 13" (with antenna up: 17-1/8" x 8-7/8" x 13")     		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) 435 mm x 161 mm x 327 mm (with antenna: 435 mm x 221 mm x 327 mm)
    17-1/8" x 6-3/8" x 12-7/8" (with antenna up: 17-1/8" x 8-3/4" x 12-7/8")
    Weight 8.3 kg (18.3 lbs) 8.3 kg (18.3 lbs) 8.3 kg (18.3 lbs) 8.1 kg (17.9 lbs)
    SPECIFICATIONS Yamaha RX-A680 Yamaha RX-A670 Yamaha RX-A660 Yamaha RX-A550
    Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 80 W (0.09% THD) 80 W (0.09% THD) 80 W (0.09% THD) 80 W (0.09% THD)
    Power Output (8 Ω, 1 kHz, 2 channel Driven, FTC) 95 W (0.9% THD) 95 W (0.09% THD) 95 W (0.09% THD) 95 W (0.9% THD)
    Rated Power Output (8 Ω, 1 kHz, 1 channel Driven) 115 W (0.9% THD) 115 W (0.9% THD) 115 W (0.9% THD) 115 W (0.9% THD)
    Maximum Effective Output Power (8 Ω, 1 kHz, 1 channel Driven, JEITA) 140 W (10% THD) 140 W (10% THD) 140 W (10% THD) 140 W (10% THD)
    Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC) 145 W (10% THD) 145 W (10% THD) 145 W (10% THD) -
    Dynamic Power per Channel (2 Ω, Front) 190 W 190 W 190 W 180 W
    Dynamic Power per Channel (4 Ω, Front) 170 W 170 W 170 W 160 W
    Dynamic Power per Channel (6 Ω, Front) 140 W 140 W 140 W 130 W
    Dynamic Power per Channel (8 Ω, Front) 120 W 120 W 120 W 110 W
    THD (Phono) 0.02% (Phono to SPEAKER OUT (Front), 20 Hz - 20 kHz, 1 V) - - -
    Damping Factor 100 (Front, 20 Hz - 20 kHz, 8 Ω) 100 (Front, 20 Hz - 20 kHz, 8 Ω) 100 (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) 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) 2.3 V (1 kHz, 0.5% THD) 2.3 V
    Rated Headphone Jack Output Level and Impedance 100 mV/470 Ω (1 kHz, 50 mV, 8 Ω) 100 mV/470 Ω (1 kHz, 50 mV, 8 Ω) 100 mV/470 Ω (1 kHz, 50 mV, 8 Ω) 100 mV/560 Ω (AV 4 etc., 1 kHz, 50 mV, 8 Ω)
    S/N Ratio (Line, IHF-A) 110 dB 110 dB 110 dB 110 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) +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) 150 µV (Speaker Out) 150 µV (Speaker Out)
    Channel Separation at 1 kHz/10 kHz (LINE) 70 dB/50 dB 75 dB/50 dB 75 dB/50 dB 75 dB/50 dB
    DSD Sampling Rates via HDMI 2.8 MHz 2.8 MHz 2.8 MHz 2.8 MHz
    DSD Sampling Rates via USB 11.2 MHz, 5.6 MHz, 2.8 MHz 5.6 MHz, 2.8 MHz 5.6 MHz, 2.8 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) 1 Vp-p/75 Ω (Composite) 1 Vp-p/75 Ω (Component Y)
    0.7 Vp-p/75 Ω (Component PB/CB, PR/CR)
    1 Vp-p/75 Ω (Composite)
    Video Maximum Input 1.5 Vp-p 1.5 Vp-p 1.5 Vp-p 1.5 Vp-p
    Video Frequency Response - - - 5 Hz to 60 MHz, -3 dB (Component)
    Video S/N Ratio 50 dB 50 dB 50 dB 50 dB
    Ethernet Standard 10BASE-T/100BASE-TX 10BASE-T/100BASE-TX 10BASE-T/100BASE-TX 10BASE-T/100BASE-TX
    Wi-Fi Standard IEEE 802.11 a/b/g/n/ac IEEE 802.11 b/g/n IEEE 802.11 b/g/n IEEE 802.11 b/g/n
    Wi-Fi Terminal Frequency 2.4 GHz, 5 GHz 2.4 GHz 2.4 GHz 2.4 GHz
    Bluetooth Version 4․2 2․1 + EDR 2․1 + EDR 2․1 + EDR
    Bluetooth Frequency 2.4 GHz 2.4 GHz 2.4 GHz -
    USB Terminal USB2.0 5 V, 1 A USB2.0 5 V, 1 A USB2.0 5 V, 1 A USB2.0 5 V, 1 A
    FM Frequency 87.5 MHz - 107.9 MHz 87.5 MHz - 107.9 MHz 87.5 MHz - 107.9 MHz 87.5 MHz - 107.9 MHz
    FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.) Mono: 3 µV (20.8 dBf) Mono: 3 µV (20.8 dBf) Mono: 3 µV (20.8 dBf) Mono: 3 µV (20.8 dBf)
    FM S/N Ratio Mono/Stereo: 65 dB/64 dB Mono/Stereo: 65 dB/64 dB Mono/Stereo: 65 dB/64 dB Mono/Stereo: 65 dB/64 dB
    FM Harmonic Distortion (IHF, 1 kHz) Mono/Stereo: 0.5%/0.6% Mono/Stereo: 0.5%/0.6% Mono/Stereo: 0.5%/0.6% Mono/Stereo: 0.5%/0.6%
    AM Frequency 530 kHz - 1710 kHz 530 kHz - 1710 kHz 530 kHz - 1710 kHz 530 MHz - 1710 MHz
    Warranty 3 Years 3 Years 3 Years 3 Years
    Amazon Affiliate Disclosure
    ZKelectronics is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon (.com, .co.uk, .ca, etc) and any other websites that may be affiliated with Amazon Service LLC Associates Program.