1-on-1 Comparison

Side-by-Side Comparison

Yamaha Aventage RX-A660 (USA and Canadian versions)

SCORE:
79

Highlights

  • 7.2 channels
  • 7.1 channel processing
  • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • Dolby Atmos, DTS:X capable
  • HDR10, 4K Passthrough
  • AirPlay, DLNA, MusicCast
  • Ethernet, Wi-Fi, Bluetooth
  • USB input

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Content

Overview

Yamaha Aventage 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.

We evaluated the a/v receiver and gave 79 overall score out of 100. Our ranking system is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

AMPLIFIER
82
VIDEO FEATURES
84
AUDIO FEATURES
85
CONNECTIVITY
79
MULTIZONE
55
MISCELLANEOUS
60
RADIO
84
OVERALL
79

Pros and Cons

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

PROS
  Dolby Atmos
  DTS:X
  DSD via HDMI
  Auto Speaker Calibration System with Mic.
  New HDCP Version
  HDR10
  4K or 8K Video Passthrough
  Works with Amazon Alexa
  Ethernet
  Wi-Fi
  Bluetooth
  USB Input
  Composite Video Inputs
  Zones
  Analog Tuner
  Pandora
  Spotify
CONS
  No Front Wide Channel Support
  No Dolby Atmos Height Virtualization
  No IMAX Enhanced
  No Auro 3D with Auro-Matic Upmixer
  No eARC
  No HDR10+
  No Dolby Vision
  No 4K or 8K Video Upscaling
  No Chromecast Built-In
  Few HDMI Inputs
  Few HDMI Outputs
  Few 8K Inputs
  No Phono Input
  No Analog Pre-Outs
  No Tidal
  Old Bluetooth Version

Predecessor

Here we are comparing Yamaha Aventage RX-A660 to its predecessor RX-A550 and displaying the major changes.

UPGRADES Yamaha Aventage RX-A660 vs Yamaha Aventage RX-A550
More Channels 7.2 vs 5.1
Bi-amp capability vs
More Channel Processing 7.1 vs 5.1
Dolby Atmos up to 5.1.2 vs
Dolby Surround Upmixer vs
DTS:X up to 5.1.2 vs
DTS Neural:X vs
DTS Dialog Control vs
Dialog Level Adjustment vs
Dialogue Lift no presence speakers required vs
HDR10 vs
BT.2020 color space vs
Zone B Video Output vs
More Speaker Terminals 7 vs 5
More Large Speaker Terminals 7 vs 5
Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 145 W (10% THD) vs [a]
Higher Dynamic Power per Channel, 2 Ω, Front) 190 W vs 180 W
Higher Dynamic Power per Channel, 4 Ω, Front) 170 W vs 160 W
Higher Dynamic Power per Channel, 6 Ω, Front) 140 W vs 130 W
Higher Dynamic Power per Channel, 8 Ω, Front) 120 W vs 110 W

DOWNGRADES Yamaha Aventage RX-A660 vs Yamaha Aventage RX-A550
Dolby Pro Logic vs PLII
Video Signal Upscaling vs up to 1080p
Less HDMI Inputs 4 vs 6
Less Component Video Inputs vs 2
Less Component Video Outputs vs 1

For more detailed comparison between the models please visit Yamaha Aventage RX-A660 vs Yamaha Aventage RX-A550.

Audio Section

7 channel Amplifier

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

    Speaker Configurations

    Yamaha Aventage RX-A660's 7 channel amplifier can be assigned for different speaker configurations.

    • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
    • 5.2.2 with internal amplifier.
    • DTS:X Configurations: 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:
    • 5.2, 7.2 with internal amplifier.
    • Bi-Amp: You can bi-amp front left and right speakers. 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.

    Dolby Atmos

    Yamaha Aventage RX-A660 supports Dolby Atmos. It is a cinematic audio format in which sounds exist as individual entities, called audio objects. In Dolby Atmos, any sound can exist as an independent audio object, free of channel restrictions. They can be precisely placed and moved anywhere in your room, including overhead, to flow above and around you in three-dimensional space. Through the use of audio objects, overhead sound, and all the richness, clarity, and power of Dolby sound, Dolby Atmos turns your room into an amazing place for entertainment. The format supports up to 128 simultaneous independent audio objects in a mix for rich, realistic, and breathtaking sound. It recreates the director's original concept through descriptive metadata to provide customized playback for home theater and delivers sounds above you through overhead speakers, special upward-firing Dolby Atmos speakers, or a Dolby Atmos enabled sound bar.

    • 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 Aventage RX-A660 supports DTS:X. A technique used in DTS:X is similar to the one used in Dolby Atmos. Instead of a fixed number of channels, DTS:X defines object locations from the listener in polar coordinates. An a/v receiver then dynamically renders sound according to the current speaker configuration. The speaker layout employed by DTS:X is the sum of Dolby Atmos and Auro-3D. It has standard 7.1 channel base layer, a 5 channel height layer above the base layer on the front and side walls, and 3 rows of speakers on the ceiling.

    • DTS Neural:X: DTS Neural:X 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: 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.

    Sound Processing

    • Adaptive DRC: Yamaha Aventage RX-A660 features Adaptive DRC (Dynamic Range Control) which automatically adjusts the dynamic range of the sound according to the volume level. This ensures that you hear clear dialog and vocals, and all sound effects at comfortable levels. There is no need to adjust the volume level as you listen; everything from whispers to big explosions will be heard clearly and comfortably at the same volume setting. It also tones down loud TV commercials, and is ideal for low-volume, late-night listening, when you do not want to disturb others.

    Room Calibration

    Yamaha Aventage RX-A660 comes with YPAO room correction system and includes the calibration microphone.

    • YPAO: The Yamaha Parametric room Acoustic Optimizer (YPAO) function detects speaker connections, measures the distances from them to your listening position(s), and then automatically optimizes the speaker settings, such as volume balance and acoustic parameters, to suit your room.

    Video Section

    HDMI

    Yamaha Aventage RX-A660 features 4 HDMI inputs. It has 1 output.

    • 4K/60Hz Passthrough: All inputs pass up to 4K 60p 4:4:4 video signal.
    • 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%.
    • HDCP 2.2 Copy Protection: All inputs and outputs are HDCP 2.2 compliant which is a requirement for 4K/HDR copy-protected content transmission.
    • 3D Ready: Yamaha Aventage RX-A660 is able to pass 3D video through HDMI.
    andh3>HDR (High Dynamic Range)

    Yamaha Aventage RX-A660 supports HDR (high dynamic range) video formats such as HDR10. 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.

    • HDR10: HDR10 uses the wide-gamut Rec. 2020 color space. It sends static metadata via video stream to the TV which calibrates its screen brightness and color according to that. HDR10 supports 10-bit color which corresponds to 1024 shades of the primary RGB colors. It is technically limited to a maximum of 10,000 nits peak brightness, however common HDR10 contents are mastered with peak brightness from 1,000 to 4,000 nits.

    Inputs and Outputs

    Audio

    • Analog Line Inputs: There are 4 line inputs for analog audio connection.
    • Digital Inputs: 1 optical input and 2 coaxial inputs are available for digital audio connection.
    • Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel.

    Video

    • HDMI:
    • Inputs: 4   Outputs: 1
      8K Inputs: 0
    • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
    • Inputs: 4   Outputs: 1
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    Specifications

    Here we list all the available features and specifications of Yamaha Aventage RX-A660.

    BASICS
    BrandYamaha
    SeriesAventage
    ModelRX-A660
    TypeA/V Receiver
    CountryUSA and Canada
    Release Year2016
    AMPLIFIER
    Channels7.2
    Front Wide Channel Support
    THX™ Certification
    Continuous 6 Ω Rated
    Discrete Output Stage Circuitry
    Bi-amp Capability
    AUDIO
    Surround:AI™
    DACBurr-Brown
    DAC Specs192 kHz/24 Bit
    Maximum Channel Processing7.1
    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
    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
    Music Playback via USBMP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
    High Resolution Music Playback via USB and/or Network up to 192 kHz
    High Resolution Audio Formats via USBApple Lossless, WAV, FLAC, AIFF, DSD
    Multi-Channel Music File Playback via USB
    Gapless Playback
    DSD via HDMI 2-ch/Multi-ch Input
    DSD via USB 2-ch Input
    DSD to PCM Converter
    USB DAC
    DTS Dialog 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
    DSP Programs17
    SILENT CINEMA / Virtual CINEMA DSP Virtual CINEMA FRONT
    Virtual Speakers including surround back
    Independent Subwoofer Outputs
    CALIBRATION
    Auto Speaker Calibration System with Mic. YPAO sound optimization
    YPAO Volume
    PEQ for SUBDown to 31 Hz
    VIDEO
    Enhanced ARC
    HDCP Version2.2
    HDR10
    HDR10+
    Dynamic HDR
    Dolby Vision
    HLG (Hybrid Log Gamma)
    BT.2020 color space
    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 4:4:4
    Video Signal Upscaling
    Analog To HDMI Upconversion
    Component Video Upscaling
    Analog to Analog Video conversion
    Video Parameter Adjustments
    isf Certified Calibration Control
    CONNECTIVITY
    MHL Input
    DLNA 1.5
    FireConnect
    FlareConnect
    MusicCast
    Chromecast Built-In
    DTS Play-Fi
    Works with Amazon Alexa on MusicCast (Voice control using your Alexa device like Echo, Dot, Tap and Show)
    Works with SONOS
    AirPlay AirPlay
    Apple Product Connection iPod, iPhone and iPad
    Remote App (iPhone® / iPad® / Android™ phone / tablet)
    InstaPrevue Input Source Prevue
    Ethernet
    Ethernet Switch
    Wi-Fi with Wireless Direct
    Bluetooth SBC, AAC
    HDBaseT Compatible
    HDMI Inputs4
    HDMI Outputs1
    8K Inputs
    USB InputUSB memory, portable audio player
    USB DC Out Port
    Analog Audio Line Input4 (1 front)
    Analog Audio Line Output
    Phono Input
    Optical Inputs1
    Optical Outputs
    Coaxial Inputs2
    Composite Video Input4
    Composite Video Output1
    S-Video Input
    S-Video Output
    Component Video Input
    Component Video Output
    PC In
    Multi-Channel Input
    Analog Pre-Outs0.2
    XLR Inputs
    XLR Pre-outs
    Front A/V InputsUSB, mini-jack Audio
    Speaker A/B
    Headphone Out6.3 mm (1/4")
    ZONES
    Zones1
    Zone B Video Output
    RS-232C Interface
    +12V Trigger Output
    Remote (IR) Input/Output0 / 0
    Party Mode
    MISC
    On-Screen Display color OSD
    SCENESCENE (4 sets)
    Web Browser Control
    PreAmp Mode
    Remote Controller
    Detachable Power Cord
    dockport
    RADIO
    Analog Tuner FM/AM
    Presets40
    Digital Radio
    Internet Radio vTuner
    Pandora
    Spotify
    Tidal
    Deezer
    Napster
    SiriusXM Internet Radio
    CONSTRUCTION
    A.R.T. Wedge
    Speaker Terminals7
    Large Speaker Terminals7
    Color-Coded Speaker Terminals
    Gold plated RCA terminals
    POWER
    Power SupplyAC 120 V, 60 Hz
    Power Consumption260 W
    Standby Power0.1 W
    GENERAL
    ECO Mode / Hybrid Standby Function
    Auto Power Standby
    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)
    Weight8.3 kg (18.3 lbs)
    Warranty3 Years
    SPECS
    Power Output (8 Ω, 20 Hz - 20 kHz, 280 W (0.09% THD)
    Power Output (8 Ω, 1 kHz, 295 W (0.09% THD)
    Rated Power Output (8 Ω, 1 kHz, 1 channel Driven)115 W (0.9% THD)
    Maximum Effective Output Power (8 Ω, 1 kHz, 1 channel Driven, JEITA)140 W (10% THD)
    Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA)145 W (10% THD)
    Dynamic Power per Channel (2190 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
    Damping Factor100 (Front, 20 Hz - 20 kHz, 8 Ω)
    Input Sensitivity and Impedance (Line)200 mV/47 kΩ (1 kHz, 100 W/6 Ω)
    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)110 dB
    Frequency Response (Analog In)+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)75 dB/50 dB
    DSD Sampling Rates via HDMI2.8 MHz
    DSD Sampling Rates via USB5.6 MHz, 2.8 MHz
    Video Input Sensitivity/Output Level and Impedance1 Vp-p/75 Ω (Composite)
    Video Maximum Input1.5 Vp-p
    Video S/N Ratio50 dB
    Ethernet Standard10BASE-T/100BASE-TX
    Wi-Fi StandardIEEE 802.11 b/g/n
    Wi-Fi Terminal Frequency2.4 GHz
    Bluetooth Version2․1 + EDR
    Bluetooth Frequency2.4 GHz
    USB TerminalUSB2.0 5 V, 1 A
    FM Frequency87.5 MHz - 107.9 MHz
    FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)Mono: 3 µV (20.8 dBf)
    FM S/N RatioMono/Stereo: 65 dB/64 dB
    FM Harmonic Distortion (IHF, 1 kHz)Mono/Stereo: 0.5%/0.6%
    AM Frequency530 kHz - 1710 kHz

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

    Successor

    In 2017 Yamaha Aventage RX-A660 was replaced by RX-A670. Let us now have a look at some important changes that the successor brought.


    UPGRADES Yamaha Aventage RX-A670 vs Yamaha Aventage RX-A660
    Dialog Normalization vs
    YPAO Volume vs
    Enhanced Audio Return Channel (eARC) vs
    Dolby Vision vs
    HLG vs
    Video Signal Upscaling up to 4K 60p 4:4:4 vs
    RS-232C Interface vs
    Remote (IR) Input/Output 0 / 0 vs 0 / 0
    Party Mode vs
    Tidal vs
    Deezer vs
    SiriusXM Internet Radio vs

    DOWNGRADES Yamaha Aventage RX-A670 vs Yamaha Aventage RX-A660
    Less Composite Video Inputs 3 vs 4

    For more detailed comparison between the models please visit Yamaha Aventage RX-A660 vs Yamaha Aventage RX-A670.

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