Yamaha Aventage RX-A670

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 84 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.

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

Here is a history of the series, where you can view and compare the main specifications of the receivers.

You can view their side-by-side comparison here: Yamaha RX-A680 vs RX-A670 vs RX-A660 vs RX-A550.

In this section we present pros and cons of Yamaha Aventage RX-A670.

In 2017 Yamaha released 13 new receivers. Here is the lineup:

You can view their side-by-side comparison here: Yamaha RX-A3070 vs RX-A2070 vs RX-A1070 vs RX-A870 vs RX-A770 vs RX-A670.

Yamaha Aventage RX-A670 has replaced RX-A660. Here we present differences between these two models.

UPGRADES	Yamaha Aventage RX-A670	vs	Yamaha RX-A660
Dialog Normalization		vs
YPAO Volume		vs
Dolby Vision		vs
HLG		vs
Enhanced Audio Return Channel (eARC)		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		vs

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

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

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.

Dolby Atmos

Yamaha Aventage RX-A670 supports Dolby Atmos with Surround Upmixer.

• 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-A670 supports DTS:X with Neural:X.

• 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.

DECODING
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

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 via HDMI ports. 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)

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.

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.3
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
Video Signal Upscaling	up to 4K 60p 4:4:4

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.

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: 3   Outputs: 1

Front A/V Inputs

• USB, mini-jack Audio

In 2018 Yamaha Aventage RX-A670 was replaced by Yamaha RX-A680. Let us now have a look at some important differences between Yamaha Aventage RX-A670 and its successor.

UPGRADES	Yamaha 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
Phono Input		vs
Web Control		vs
Napster		vs
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 RX-A680	vs	Yamaha Aventage RX-A670
RS-232C Interface		vs
Remote (IR) Input/Output	0 / 0	vs	0 / 0
Party Mode		vs
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 RX-A680.

GENERAL
Brand	Yamaha
Series	Aventage
Model	RX-A670
Type	A/V Receiver
Country	USA and Canada
Release Year	2017
Predecessor	Yamaha RX-A660
Successor	Yamaha RX-A680

AMPLIFIER
Channels	7.2
Power Output	80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
Front Wide Channel Support
THX™ Certification
Continuous 6 Ω Rated
Discrete Output Stage Circuitry
Bi-amp Capability

AUDIO FEATURES
Surround:AI™
DAC	Burr-Brown
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 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
Network Audio Formats	MP3, WMA, MPEG-4 AAC, Apple Lossless, WAV, FLAC, AIFF, DSD
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
Gapless Playback
DSD via HDMI	2-ch/Multi-ch Input
DSD via USB	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 enhancer 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 Programs	17
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 SUB	Down to 31 Hz

VIDEO FEATURES
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.3
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
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

CONNECTIVITY
Wi-Fi	with Wireless Direct
Bluetooth	SBC, AAC
Works with Amazon Alexa	on MusicCast (Voice control using your Alexa device like Echo or Echo Dot)
Chromecast Built-In
Works with SonoS
DTS Play-Fi
MHL Input
DLNA 1.5
MusicCast
AirPlay	AirPlay
Apple Product Connection	iPod, iPhone and iPad
Remote App	(iPhone® / iPad® / Android™ phone / tablet)
InstaPrevue Input Source Prevue

TERMINALS
HDMI Inputs	4
HDMI Outputs	1
8K Inputs
USB Input	USB memory, portable audio player
USB DC Out Port
Optical Inputs	1
Optical Outputs
Coaxial Inputs	2
RCA Line Inputs	4 (1 front)
RCA Line Outputs
XLR Line Inputs
Phono Input
Multi-Channel Input
RCA Pre-Outs	0.2
XLR Pre-outs
Composite Video Inputs	3
Composite Video Outputs	1
S-Video Inputs
S-Video Outputs
Component Video Inputs
Component Video Outputs
Ethernet
Ethernet Switch
PC In
Front A/V Inputs	USB, mini-jack Audio
Speaker A/B
Headphone Out	6.3 mm (1/4")
Detachable Power Cord
dockport

ZONES
Number of Zones	1
Zone B Video Output
RS-232C Interface
+12V Trigger Output
Remote (IR) Input/Output	0 / 0
Party Mode

MISCELLANEOUS
On-Screen Display	color OSD
SCENE	SCENE (4 sets)
Web Control
PreAmp Mode

RADIO
Analog Tuner	FM/AM
Presets	40
Digital Radio
Internet Radio
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM

CONSTRUCTION
A.R.T. Wedge
Speaker Terminals	7
Large Speaker Terminals	7
Color-Coded Speaker Terminals
Gold plated RCA terminals

POWER
Power Supply	AC 120 V, 60 Hz
Power Consumption	260 W
Standby Power	0.1 W
ECO Mode / Hybrid Standby Function
Auto Power Standby

PHYSICAL
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)

SPECIFICATIONS
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	80 W (0.09% THD)
Power Output (8 Ω, 1 kHz, 2 channel Driven, FTC)	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 or IEC)	145 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
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
Ethernet Standard	10BASE-T/100BASE-TX
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
Warranty	3 Years

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