Onkyo TX-NR646 vs Yamaha RX-A2020

GENERAL	Onkyo TX-NR646	Yamaha RX-A2020
Brand	Onkyo	Yamaha
Series		Aventage
Model	TX-NR646	RX-A2020
Type	A/V Receiver	A/V Receiver
Country	Taiwan	General
Release Year	2015	2012
Predecessor	Onkyo TX-NR636	Yamaha RX-A2010
Successor	Onkyo TX-NR656	Yamaha RX-A2030

AMPLIFIER	Onkyo TX-NR646	Yamaha RX-A2020
Channels	7.2	9.2
Power Output	100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)	140 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
Front Wide Channel Support
WRAT (Wide Range Amplifier Technology)
VLSC (Vector Linear Shaping Circuitry)
Optimum Gain Volume Circuitry
THX™ Certification
Continuous 6 Ω Rated
Certified 4 Ω Performance
Discrete Output Stage Circuitry
3-Stage Inverted Darlington Circuitry
PUSH-PULL Design
Independent Block Construction (Amp/Preprocessor)
Bi-amp Capability
BTL (Bridged Transless or Bridging)

AUDIO FEATURES	Onkyo TX-NR646	Yamaha RX-A2020
Digital Signal Processing (DSP) Engine	Dual 32-bit DSP for Powerful Advanced Processing
Surround:AI™
DAC	Asahi Kasei AK4458	Burr-Brown
DAC Specs	384 kHz/32 Bit	192 kHz/24 Bit
Maximum Channel Processing	7.1	9.1
Air Studios Monitor Certification
Dolby Atmos	up to 5.1.2 after firmware update
Dolby Atmos Height Virtualization
Dolby Atmos Music
Dolby TrueHD
Dolby Digital Plus
Dolby Surround Upmixer
Dolby Pro Logic		PLIIx
Dolby Digital EX
Surround EX
DTS:X	up to 5.1.2 after firmware update
DTS Neural:X	after firmware update
DTS Virtual:X
DTS Neo	Neo:6 until firmware update	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
Music Playback via USB	FLAC, WAV, Apple Lossless, WMA, WMA Lossless, Ogg, MP3, DSD, AAC, LPCM, Dolby TrueHD	MP3, WMA, AAC, WAV, FLAC
High Resolution Music Playback via USB and/or Network	up to 96 kHz	up to 96 kHz
High Resolution Audio Formats via USB	FLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC	WAV, FLAC
Gapless Playback
DSD via HDMI	2-ch/Multi-ch Input	2-ch/Multi-ch Input
DSD via USB	2-ch Input
DSD to PCM Converter
USB DAC
Jitter Reduction	PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio	Ultra low jitter PLL circuitry
DTS Dialogue Control
Dialog Enhancement
Dialog Level Adjustment	DTS:X only
Dialog normalization
Dialogue Lift		no presence speakers required
Tone Control	Front L/R Channels
Compressed Music Enhancer	Advanced Music Optimizer (bluetooth included)	high-resolution
High-resolution Music Enhancer
Adaptive DRC (Dynamic Range Control)
Initial Volume & Maximum Volume Setting
THX Processing Mode
Audyssey Dynamic EQ
Audyssey Dynamic Volume
Audyssey LFC
Audyssey Sub EQ HT
Audyssey DSX
Phase-Matching Bass Boost	for Deep Bass and Clear Mid-Range
Direct Mode
Pure Audio Mode
Pure Direct Analog Path Mode
Straight Decoding Mode
Pure Direct Mode		with video on mode
CINEMA DSP		3D
DSP Programs		23
SILENT CINEMA / Virtual CINEMA DSP
Virtual Speakers	T-D (Theater-Dimensional)
Independent Subwoofer Outputs

CALIBRATION	Onkyo TX-NR646	Yamaha RX-A2020
Auto Speaker Calibration System with Mic.	AccuEQ Advance	YPAO sound optimization (R.S.C. with Multipoint measurement)
YPAO Volume
PEQ for SUB		Down to 31 Hz

VIDEO FEATURES	Onkyo TX-NR646	Yamaha RX-A2020
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.2 (3 inputs / 2 outputs)	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 (RGB/YCbCr4:4:4/YCbCr4:2:2, 24 bit)	up to 4K
Video Signal Upscaling		HQV Vida
Analog To HDMI Upconversion	Component**, Composite	Component****, S-Video, Composite
Component Video Upscaling
Analog to Analog Video conversion		(Component**, S-Video, Composite) to (Component, S-Video, Composite)
Component Video Maximum Resolution	480i/576i	1080p
Video Parameter Adjustments
isf Certified Calibration Control

CONNECTIVITY	Onkyo TX-NR646	Yamaha RX-A2020
Wi-Fi		via optional YWA-10 adapter (sold separately)
Bluetooth
Works with Amazon Alexa
Chromecast Built-In
Works with SonoS
DTS Play-Fi
MHL Input
DLNA 1.5
MusicCast
AirPlay	AirPlay	AirPlay
Apple Product Connection	iPod, iPhone and iPad	iPod, iPhone and iPad
Remote App	Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices	(iPhone / iPad, Android™ phone / tablet, Kindle Fire™ )
InstaPrevue Input Source Prevue

TERMINALS	Onkyo TX-NR646	Yamaha RX-A2020
HDMI Inputs	8 (1 front)	8 (1 front)
HDMI Outputs	2 (simultaneous)	2
8K Inputs
USB Input	1 (Rear)	iPod® / iPhone® / iPad®, USB memory, portable audio player
USB DC Out Port		(USB DC output 5 V / 0.5 amp)
Optical Inputs	2	4 (1 front)
Optical Outputs		1
Coaxial Inputs	1	3
RCA Line Inputs	7	9 (1 front)
RCA Line Outputs	1	1
XLR Line Inputs
Phono Input
Multi-Channel Input		7.1
RCA Pre-Outs	0.2	7.2
XLR Pre-outs
Composite Video Inputs	3	5 (1 front)
Composite Video Outputs		2
S-Video Inputs		4
S-Video Outputs		2
Component Video Inputs	2	4
Component Video Outputs		1
Ethernet
Ethernet Switch
PC In
Front A/V Inputs	HDMI	HDMI, USB, analog audio, optical, composite
Speaker A/B
Headphone Out	6.3 mm (1/4")	6.3 mm (1/4")
Detachable Power Cord
uport
dockport

ZONES	Onkyo TX-NR646	Yamaha RX-A2020
Number of Zones	2	3
Powered Zones	2	Zone 2 / 3
Zone 2 Outs	RCA Line Out	Component, Composite, Line Out
Zone 3 Outs		Component, Composite, Line Out
Zone B Video Output		HDMI
Zone GUI
Whole House Mode
RS-232C Interface
+12V Trigger Output	0	(2)
Remote (IR) Input/Output	0 / 0	2 / 2
Party Mode

MISCELLANEOUS	Onkyo TX-NR646	Yamaha RX-A2020
On-Screen Display	Graphical Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up	Graphical user interface
SCENE		SCENE PLUS (12 sets)
Web Control
PreAmp Mode
Remote Controller		(Preset, learning, macro)
ONKYO-RI System Control
RIHD (Remote Interactive Over HDMI)
Pre-Pro/Learning Remote	/
On Screen Remote Programming
Bi-directional Remote Setup via GUI
Smart Grid-Ready

RADIO	Onkyo TX-NR646	Yamaha RX-A2020
Analog Tuner	FM/AM	FM/AM
Presets	40	40
Digital Radio
Internet Radio	TuneIn
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM

CONSTRUCTION	Onkyo TX-NR646	Yamaha RX-A2020
Solid Aluminum Front		Aluminum
A.R.T. Wedge
Speaker Terminals	9	11
Large Speaker Terminals	9	11
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
Gold plated RCA terminals

POWER	Onkyo TX-NR646	Yamaha RX-A2020
Power Supply	AC 120 V, 60 Hz	AC 110-120/220-240 V, 50/60 Hz
Independent Power Supply	2
H.C.P.S. (High Current Power Supply)	Massive High Power Transformer
Toroidal Transformer
Power Consumption	6.4 A	490 W
Maximum Power Consumption		1210 W
No Sound Power	70 W
Standby Power	0.1 W	0.3 W
Capacitor Bank	8,200 µF
ECO Mode / Hybrid Standby Function
Auto Power Standby

PHYSICAL	Onkyo TX-NR646	Yamaha RX-A2020
Dimensions (W x H x D)	435 mm x 173.5 mm x 329 mm 17-1/8" x 6-13/16" x 12-15/16"	435 mm x 192 mm x 467 mm 17-1/8" x 7-1/2" x 18-3/8"
Weight	9.4 kg (20.7 lbs)	17.1 kg (37.7 lbs)

SPECIFICATIONS	Onkyo TX-NR646	Yamaha RX-A2020
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	100 W (0.08% THD)	140 W (0.06% THD)
Power Output (8 Ω, 1 kHz, 2 channel Driven, FTC)		155 W (0.9% THD)
Rated Power Output (8 Ω, 1 kHz, 1 channel Driven)		175 W (0.9% THD)
Maximum Effective Output Power (8 Ω, 1 kHz, 1 channel Driven, JEITA)		220 W (10% THD)
Power Output (6 Ω, 1 kHz, 1 channel driven, FTC)	170 W (0.9% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)	175 W
Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)	160 W (1% THD)
Rated Power Output (4 Ω, 1 kHz, 1 channel Driven)		220 W (0.9% THD, Front)
Dynamic Power per Channel (2 Ω, Front)		405 W
Dynamic Power per Channel (3 Ω, Front)	240 W
Dynamic Power per Channel (4 Ω, Front)	210 W	285 W
Dynamic Power per Channel (6 Ω, Front)		210 W
Dynamic Power per Channel (8 Ω, Front)	120 W	165 W
THD	0.08% (20 Hz - 20 kHz, Half power)	0.04% (MULTI CH INPUT to Speaker Out, Pure Direct, 70 W, 8 Ω)
THD (Phono)		0.02% (Phono to AV OUT)
Damping Factor	60 (Front, 1 kHz, 8 Ω)	150 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance (Line)	200 mV/47 kΩ (Line)	200 mV/47 kΩ
Input Sensitivity and Impedance (Phono MM)	3.5 mV/47 kΩ (Phono mm)	3.5 mV/47 kΩ
Maximum Input Sensitivity (Line)		2.4 V
Maximum Input Sensitivity (Phono)		60 mV
Rated Preout Level and Impedance		1.0 V/1.2 kΩ
Rated Lineout Level and Impedance		200 mV/1.2 kΩ (AV OUT)
Rated Headphone Jack Output Level and Impedance		150 mV/100 Ω
Phono Overload	70 mV (MM, 1 kHz 0.5% Direct)
S/N Ratio (Line, IHF-A)	100 dB	100 dB
S/N Ratio (Phono MM, IHF-A)	80 dB	86 dB
Frequency Response (Analog In)	10 Hz - 100 kHz/+1 dB, -3 dB (Direct mode)	+0/-3 dB (10 Hz to 100 kHz)
Residual noise (IHF-A Network)		150 µV (Front L/R Speaker Out)
Channel Separation at 1 kHz/10 kHz (LINE)		60 dB/45 dB
Channel Separation at 1 kHz/10 kHz (Phono)		60 dB/55 dB
DSD Sampling Rates via HDMI	2.8 MHz, 5.6 MHz	2.8 MHz
DSD Sampling Rates via USB	2.8 MHz, 5.6 MHz
Video Input Sensitivity/Output Level and Impedance	1 Vp-p/75 Ω (Component Y) 0.7 Vp-p/75 Ω (Component PB/CB, PR/CR) 1 Vp-p/75 Ω (Composite)	1 Vp-p/75 Ω (Component Y and S-Video Y) 0.7 Vp-p/75 Ω (Component PB/CB, PR/CR) 1 Vp-p/75 Ω (Composite) 0.286 Vp-p/75 Ω (S-Video C)
Video Maximum Input		1.5 Vp-p
Video Frequency Response	5 Hz - 100 MHz/+0 dB, -3 dB (Component)	5 Hz to 100 MHz, ±3 dB (Component)
Video S/N Ratio		60 dB
Ethernet Standard	10BASE-T/100BASE-TX	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	5 V, 1 A	USB2.0 5 V, 2.1 A
FM Frequency	87.5 MHz - 107.9 MHz	87.5/87.50 MHz - 108.0/108.00 MHz
FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)		Mono: 3 µV (20.8 dBf)
FM S/N Ratio		Mono/Stereo: 72 dB/ 70 dB
FM Harmonic Distortion (IHF, 1 kHz)		Mono/Stereo: 0.3%/0.5%
AM Frequency	522/530 kHz - 1611/1710 kHz	530/531 MHz - 1710/1611 MHz
Warranty	2 Years	3 Years

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

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