Arcam AVR20 vs Onkyo TX-NR646

GENERAL	Arcam AVR20	Onkyo TX-NR646
Brand	Arcam	Onkyo
Series	HDA
Model	AVR20	TX-NR646
Type	A/V Receiver	A/V Receiver
Country	All	Others
Release Year	2019	2015
Predecessor		Onkyo TX-NR636
Successor	Arcam AVR21	Onkyo TX-NR656

AMPLIFIER	Arcam AVR20	Onkyo TX-NR646
Channels	7.2	7.2
Power Output	110 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)	100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
Front Wide Channel Support
Amplifier Design	Class A/B
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	Arcam AVR20	Onkyo TX-NR646
Digital Signal Processing (DSP) Engine		Dual 32-bit DSP for Powerful Advanced Processing
DAC	ESS 9026PRO	Asahi Kasei AK4458
DAC Specs	192 kHz/24 Bit	384 kHz/32 Bit
Maximum Channel Processing	15.2	7.1
Air Studios Monitor Certification
Dolby Atmos	up to 9.1.6 with external amp	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
Dolby Digital EX
Surround EX
DTS:X	Pro up to 9.1.6 with external amp	up to 5.1.2 after firmware update
DTS Neural:X		after firmware update
DTS Virtual:X
DTS Neo		Neo:6 until firmware update
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	13.1-ch (Built-In)
MQA Decoding
PCM	2-ch/Multi-ch Input	2-ch/Multi-ch Input
Network Audio Formats	MP3, WMA, AAC, WAV, FLAC, AIFF, ALAC, MQA
Music Playback via USB		FLAC, WAV, Apple Lossless, WMA, WMA Lossless, Ogg, MP3, DSD, AAC, LPCM, Dolby TrueHD
High Resolution Music Playback via USB and/or Network	up to 192 kHz	up to 96 kHz
High Resolution Audio Formats via USB		FLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC
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
DTS Dialogue Control
Dialog Enhancement
Dialog Level Adjustment		DTS:X only
Dialog normalization
Dialogue Lift
Tone Control		Front L/R Channels
Compressed Music Enhancer		Advanced Music Optimizer (bluetooth included)
High-resolution Music Enhancer
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	Stereo Direct, CD Direct
Pure Audio Mode
Pure Direct Analog Path Mode
Virtual Speakers		T-D (Theater-Dimensional)
Independent Subwoofer Outputs

CALIBRATION	Arcam AVR20	Onkyo TX-NR646
Auto Speaker Calibration System with Mic.	Dirac Live™	AccuEQ Advance

VIDEO FEATURES	Arcam AVR20	Onkyo TX-NR646
HDR10
HDR10+
Dynamic HDR
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
HDMI Version	2.0b
HDBaseT Compatible
Enhanced Audio Return Channel (eARC)
HDCP Version	2.2	2.2 (3 inputs / 2 outputs)
QMS (Quick Media Switching)
ALLM (Auto Low Latency Mode)
VRR (Variable Refresh Rate)
QFT (Quick Frame transport)
DSC (Display Stream Compression)
3-D Ready
Video Signal Passthrough	up to 4K 50/60Hz 4:4:4	up to 4K/60p (RGB/YCbCr4:4:4/YCbCr4:2:2, 24 bit)
Video Signal Upscaling
Analog To HDMI Upconversion		Component**, Composite
Component Video Upscaling
Analog to Analog Video conversion
Component Video Maximum Resolution		480i/576i
isf Certified Calibration Control

CONNECTIVITY	Arcam AVR20	Onkyo TX-NR646
Wi-Fi
Bluetooth	aptX HD
Works with Amazon Alexa
Google Assistant
Chromecast Built-In
Apple Siri
Works with SonoS
DTS Play-Fi
MHL Input
DLNA 1.5
AirPlay	AirPlay 2	AirPlay
Apple Product Connection	iPod, iPhone and iPad	iPod, iPhone and iPad
Remote App	Arcam control app	Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices
InstaPrevue Input Source Prevue

TERMINALS	Arcam AVR20	Onkyo TX-NR646
HDMI Inputs	7	8 (1 front)
HDMI Outputs	3 (2 for MAIN, 1 for ZONE2)	2 (simultaneous)
8K Inputs
USB Input	for factory service	1 (Rear)
USB DC Out Port
Optical Inputs	2	2
Optical Outputs	1
Coaxial Inputs	4	1
RCA Line Inputs	7 (1 front)	7
RCA Line Outputs	1	1
XLR Line Inputs
Phono Input
Multi-Channel Input
RCA Pre-Outs	15.2	0.2
XLR Pre-outs
Composite Video Inputs		3
Composite Video Outputs
S-Video Inputs
S-Video Outputs
Component Video Inputs		2
Component Video Outputs
Ethernet
Ethernet Switch
PC In
Front A/V Inputs	AUX (3.5 mm Audio)	HDMI
Speaker A/B
Headphone Out	3.5 mm (1/8")	6.3 mm (1/4")
Detachable Power Cord
uport

ZONES	Arcam AVR20	Onkyo TX-NR646
Number of Zones	2	2
Powered Zones	2	2
Zone 2 Outs	HDMI, Pre Out	RCA Line Out
Whole House Mode
RS-232C Interface
+12V Trigger Output	2	0
Remote (IR) Input/Output	2 / 0	0 / 0

MISCELLANEOUS	Arcam AVR20	Onkyo TX-NR646
On-Screen Display		Graphical Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up
IP Control
PreAmp Mode
Display	Large front-panel LCD display
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	Arcam AVR20	Onkyo TX-NR646
Analog Tuner	FM with RDS	FM/AM with RDS
Presets	50	40
Digital Radio	DAB/DAB+
Internet Radio	TuneIn	TuneIn
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM

CONSTRUCTION	Arcam AVR20	Onkyo TX-NR646
Solid Aluminum Front
Speaker Terminals	7	9
Large Speaker Terminals	7	9
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
Gold plated RCA terminals

POWER	Arcam AVR20	Onkyo TX-NR646
Power Supply	AC 110-120 V or 220-240 V, 50/60 Hz via switch	AC 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	1500 W	630 W
No Sound Power		70 W
Standby Power	0.5 W	0.15 W
Capacitor Bank		8,200 µF
ECO Mode / Hybrid Standby Function

PHYSICAL	Arcam AVR20	Onkyo TX-NR646
Dimensions (W x H x D)	433 mm x 171 mm x 425 mm 17.06" x 6.69" x 18.56"	435 mm x 173.5 mm x 329 mm 17-1/8" x 6-13/16" x 12-15/16"
Weight	16.6 kg (36.4 lbs)	9.8 kg (21.6 lbs)
Weight of Package	19.9 kg

SPECIFICATIONS	Arcam AVR20	Onkyo TX-NR646
Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)	110 W (0.02% THD)	100 W (0.08% THD)
Power Output (8 Ω, 1 kHz, 2 channel Driven, FTC)	125 W (0.2% 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)
Power Output (4 Ω, 20 Hz - 20 kHz, 2 channel Driven)	175 W (0.2% THD)
Power Output (4 Ω, 1 kHz, 2 channel Driven)	190 W (0.2% THD)
Multi Channel Simultaneous Drive	90 W (7 channels driven, 1kHz, 8 Ω, 0.2% THD) 110 W (7 channels driven, 1kHz, 4 Ω, 0.2% THD)
Dynamic Power per Channel (3 Ω, Front)		240 W
Dynamic Power per Channel (4 Ω, Front)		210 W
Dynamic Power per Channel (8 Ω, Front)		120 W
THD		0.08% (20 Hz - 20 kHz, Half power)
Damping Factor		60 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance (Line)	1V, 2V, 4V (user adjustable)/47 kΩ	200 mV/47 kΩ (Line)
Input Sensitivity and Impedance (Phono MM)		3.5 mV/47 kΩ (Phono mm)
Maximum Input Sensitivity (Line)	4.5 Vrms
Rated Preout Level and Impedance	1 Vrms/560 Ω
Maximum Preout Level and Impedance	5 Vrms/560 Ω
Rated Headphone Jack Output Level and Impedance	5 Vrms/100 Ω
Phono Overload		70 mV (MM, 1 kHz 0.5% Direct)
S/N Ratio (Line, IHF-A)	93 dB (normal) 110 dB (stereo direct)	100 dB
S/N Ratio (Phono MM, IHF-A)		80 dB
Frequency Response (Analog In)	±0.2 dB (20 Hz to 20 kHz)	10 Hz - 100 kHz/+1 dB, -3 dB (Direct mode)
Residual noise (IHF-A Network)	0.15 mV
DSD Sampling Rates via HDMI	2.8 MHz	2.8 MHz, 5.6 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)
Video Frequency Response		5 Hz - 100 MHz/+0 dB, -3 dB (Component)
Ethernet Standard		10BASE-T/100BASE-TX
Wi-Fi Standard	IEEE 802.11 ac	IEEE 802.11 b/g/n
Wi-Fi Terminal Frequency	5 GHz, 2.4 GHz	2.4 GHz
Bluetooth Version	5․0	2․1 + EDR
Bluetooth Frequency		2.4 GHz
USB Terminal		5 V, 1 A
FM Frequency		87.5 MHz - 108.0 MHz
AM Frequency		522/530 kHz - 1611/1710 kHz
Warranty	5 Years	2 Years

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

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