Yamaha Aventage RX-A670 (USA and Canadian versions)
- 7.2 channels
- 7.1 channel processing
- 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
- Dolby Atmos, DTS:X capable
- HDR10, Dolby Vision, 4K Upscaling, 4K Passthrough
- AirPlay, DLNA, MusicCast
- Ethernet, Wi-Fi, Bluetooth
- USB input
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Yamaha Aventage RX-A670 was introduced in 2017. 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 the a/v receiver and gave 82 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.
Pros and Cons
In this section we present pros and cons of Yamaha Aventage RX-A670.
|DSD via HDMI|
|Auto Speaker Calibration System with Mic.|
|New HDCP Version|
|4K or 8K Video Passthrough|
|4K or 8K Signal Upscaling|
|Works with Amazon Alexa|
|Composite Video Inputs|
|No Front Wide Channel Support|
|No Dolby Atmos Height Virtualization|
|No IMAX Enhanced|
|No Auro 3D with Auro-Matic Upmixer|
|No Chromecast Built-In|
|Few HDMI Inputs|
|Few HDMI Outputs|
|Few 8K Inputs|
|Few Optical Inputs|
|No RCA Pre-Outs|
|Old Bluetooth Version|
Here we are comparing Yamaha Aventage RX-A670 to its predecessor RX-A660 and displaying the major changes.
|UPGRADES||Yamaha Aventage RX-A670||vs||Yamaha Aventage RX-A660|
|Enhanced Audio Return Channel (eARC)||vs|
|Video Signal Upscaling||up to 4K 60p 4:4:4||vs|
|Remote (IR) Input/Output||0 / 0||vs||0 / 0|
|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-A670 vs Yamaha Aventage RX-A660.
7 channel Amplifier
Yamaha Aventage RX-A670 features 7 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).
Yamaha Aventage RX-A670'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.
- 2-ch Bi-Amp: Yamaha Aventage RX-A670 allows you 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.
Yamaha Aventage RX-A670 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.
Yamaha Aventage RX-A670 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.
Enhanced Audio Return Channel (eARC)
Audio Return Channel (ARC) feature 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.
- Adaptive DRC: Yamaha Aventage RX-A670 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.
Yamaha Aventage RX-A670 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.
Yamaha Aventage RX-A670 features 4 HDMI inputs. It has 1 output.
- 4K/60Hz Passthrough: All inputs pass up to 4K 60p 4:4:4 video signal.
- 4K Upscaling: Yamaha Aventage RX-A670 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%.
- HDCP 2.3 Copy Protection: All inputs and outputs are HDCP 2.3 compliant which is a requirement for 4K/HDR copy-protected content transmission.
- 3D Ready: Yamaha Aventage RX-A670 is able to pass 3D video through HDMI.
HDR (High Dynamic Range)
Yamaha Aventage RX-A670 supports HDR (high dynamic range) video formats such as 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.
- 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.
- Dolby Vision: Dolby Vision is a set of technologies developed by Dolby Laboratories for high dynamic range (HDR) video. It covers content creation, distribution, and playback. Like HDR10+, it includes dynamic metadata that are used to adjust and optimize each frame of the HDR video to the consumer display's capabilities in a way specified by the content creator. Dolby Vision allows for a maximum resolution of 8K up to 12-bit color depth, maximum peak brightness of 10,000 nits and a color gamut up to Rec. 2020. It uses Dolby's proprietary dynamic metadata defined in SMPTE ST 2094-10.
- Hybrid Log-Gamma (HLG): The Hybrid Log-Gamma (HLG) is a transfer function developed mainly for HDR live video feed and over-the-air broadcasts. It is an HDR format that uses BT.2020 color primaries and a bitdepth of 10-bit. It is backward compatible with the transfer function of SDR and is designed to be better-suited for television broadcasting, where the metadata required for other HDR formats is not backward compatible with non-HDR displays. HLG defines a non-linear optical-electro transfer function, in which the lower half of the signal values use a gamma curve and the upper half of the signal values use a logarithmic curve.
Inputs and Outputs
- Analog Line Inputs: There are 4 line inputs for analog audio connection.
- Digital Inputs and Outputs: 0 optical input, 1 optical output 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.
- Inputs: 4 Outputs: 1
8K Inputs: 0
- Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
- Inputs: 3 Outputs: 1
Here we list all the available features and specifications of Yamaha Aventage RX-A670.
|Country||USA and Canada|
|Front Wide Channel Support|
|Continuous 6 Ω Rated|
|Discrete Output Stage Circuitry|
|DAC Specs||192 kHz/24 Bit|
|Maximum Channel Processing||7.1|
|Air Studios Monitor Certification|
|Dolby Atmos||up to 5.1.2|
|Dolby Atmos Height Virtualization|
|Dolby Atmos Music|
|Dolby Digital Plus|
|Dolby Surround Upmixer|
|Dolby Pro Logic|
|Dolby Digital EX|
|DTS:X||up to 5.1.2|
|DTS-HD Master Audio|
|DTS-HD High Resolution Audio|
|DTS-ES||Discrete 6.1, Matrix 6.1|
|Auro 3D with Auro-Matic Upmixer|
|Music Playback via USB||MP3, 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 USB||Apple Lossless, WAV, FLAC, AIFF, DSD|
|DSD via HDMI||2-ch/Multi-ch Input|
|DSD via USB||2-ch Input|
|DSD to PCM Converter|
|DTS Dialog Control|
|Dialog Level Adjustment|
|Dialogue Lift||no presence speakers required|
|Compressed Music Enhancer||including enhancer for Bluetooth®|
|High-resolution Music Enhancer|
|Adaptive DRC (Dynamic Range Control)|
|Initial Volume & Maximum Volume Setting|
|Audyssey Dynamic EQ|
|Audyssey Dynamic Volume|
|Audyssey Sub EQ HT|
|Straight Decoding Mode|
|SILENT CINEMA / Virtual CINEMA DSP||Virtual CINEMA FRONT|
|Virtual Speakers||including surround back|
|Independent Subwoofer Outputs|
|Auto Speaker Calibration System with Mic.||YPAO sound optimization|
|PEQ for SUB||Down to 31 Hz|
|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)|
|Video Signal Passthrough||up to 4K 60p 4:4:4|
|Video Signal Upscaling||up to 4K 60p 4:4:4|
|Analog To HDMI Upconversion|
|Analog to Analog Video conversion|
|Video Parameter Adjustments|
|isf Certified Calibration Control|
|Works with Amazon Alexa||on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)|
|Works with SONOS|
|Apple Product Connection||iPod, iPhone and iPad|
|Remote App||(iPhone® / iPad® / Android™ phone / tablet)|
|InstaPrevue Input Source Prevue|
|Wi-Fi||with Wireless Direct|
|USB Input||USB memory, portable audio player|
|USB DC Out Port|
|RCA Line Input||4 (1 front)|
|RCA Line Output|
|XLR Line Inputs|
|Composite Video Input||3|
|Composite Video Output||1|
|Component Video Input|
|Component Video Output|
|Front A/V Inputs||USB, mini-jack Audio|
|Headphone Out||6.3 mm (1/4")|
|Zone B Video Output|
|+12V Trigger Output|
|Remote (IR) Input/Output||0 / 0|
|On-Screen Display||color OSD|
|SCENE||SCENE (4 sets)|
|Web Browser Control|
|Detachable Power Cord|
|SiriusXM Internet Radio|
|Large Speaker Terminals||7|
|Color-Coded Speaker Terminals|
|Gold plated RCA terminals|
|Power Supply||AC 120 V, 60 Hz|
|Power Consumption||260 W|
|Standby Power||0.1 W|
|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)|
|Weight||8.3 kg (18.3 lbs)|
|Power Output (8 Ω, 20 Hz - 20 kHz, 2||80 W (0.09% THD)|
|Power Output (8 Ω, 1 kHz, 2||95 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 (2||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|
|Damping Factor||100 (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 Impedance||100 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 HDMI||2.8 MHz|
|DSD Sampling Rates via USB||5.6 MHz, 2.8 MHz|
|Video Input Sensitivity/Output Level and Impedance||1 Vp-p/75 Ω (Composite)|
|Video Maximum Input||1.5 Vp-p|
|Video S/N Ratio||50 dB|
|Wi-Fi Standard||IEEE 802.11 b/g/n|
|Wi-Fi Terminal Frequency||2.4 GHz|
|Bluetooth Version||2․1 + EDR|
|Bluetooth Frequency||2.4 GHz|
|USB Terminal||USB2.0 5 V, 1 A|
|FM Frequency||87.5 MHz - 107.9 MHz|
|FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)||Mono: 3 µV (20.8 dBf)|
|FM S/N Ratio||Mono/Stereo: 65 dB/64 dB|
|FM Harmonic Distortion (IHF, 1 kHz)||Mono/Stereo: 0.5%/0.6%|
|AM Frequency||530 kHz - 1710 kHz|
* - 480i/576i and 480p/576p only
** - 480i/576i only
*** - no 1080p/24 upconversion
**** - 1080p signal is not converted
In 2018 Yamaha Aventage RX-A670 was replaced by RX-A680. Let us now have a look at some important changes that the successor brought.
|UPGRADES||Yamaha Aventage RX-A680||vs||Yamaha Aventage RX-A670|
|Higher DAC Specs||384 kHz/32 Bit||vs||192 kHz/24 Bit|
|Higher Resolution Music Playback via USB||up to 192 kHz/32 Bit||vs||up to 192 kHz|
|Newer HDCP Version||2.3||vs||2.3|
|AirPlay||AirPlay 2 via firmware update||vs||AirPlay|
|More Optical Inputs||1||vs||1|
|Higher DSD Sampling Rate via USB||11.2 MHz, 5.6 MHz, 2.8 MHz||vs||5.6 MHz, 2.8 MHz|
|Wi-Fi Standard||IEEE 802.11 a/b/g/n/ac||vs||IEEE 802.11 b/g/n|
|Wi-Fi Terminal Frequency||2.4 GHz, 5 GHz||vs||2.4 GHz|
|Newer Bluetooth Version||4․2||vs||2․1 + EDR|
|DOWNGRADES||Yamaha Aventage RX-A680||vs||Yamaha Aventage RX-A670|
|Remote (IR) Input/Output||0 / 0||vs||0 / 0|
|Worse Channel Separation at 1 kHz/10 kHz (LINE)||70 dB/50 dB||vs||75 dB/50 dB|
For more detailed comparison between the models please visit Yamaha Aventage RX-A670 vs Yamaha Aventage RX-A680.