1-on-1 Comparison

Side-by-Side Comparison

Onkyo TX-RZ630

Onkyo TX-RZ620

SCORE:
88
SCORE:
87

Highlights

  • 9.2 channels
  • 9.1 channel processing
  • 90 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • Dolby Atmos, DTS:X capable
  • HDR10, Dolby Vision, 4K Passthrough
  • AirPlay 2, Chromecast
  • Ethernet, Wi-Fi, Bluetooth
  • USB and Phono inputs

Highlights

  • 7.2 channels
  • 7.1 channel processing
  • 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • Dolby Atmos, DTS:X capable
  • HDR10, Dolby Vision, 4K Passthrough
  • AirPlay, DLNA, Chromecast, DTS Play-Fi
  • Ethernet, Wi-Fi, Bluetooth
  • USB and Phono inputs

Disclosure: We earn money from the affiliate links to products associated with content in this article.

Content

Overview

Here we are comparing Onkyo TX-RZ630 to Onkyo TX-RZ620 to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. The Onkyo TX-RZ630 has 9 channel and the Onkyo TX-RZ620 has 7 channel amplifiers with Onkyo TX-RZ630's being less powerful.

We have evaluated both receivers. Onkyo TX-RZ630 gets higher overall score in our ranking system which is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

Onkyo TX-RZ630

Onkyo TX-RZ620

AMPLIFIER
87
VIDEO FEATURES
94
AUDIO FEATURES
88
CONNECTIVITY
85
MULTIZONE
90
MISCELLANEOUS
68
RADIO
92
OVERALL
88
AMPLIFIER
89
VIDEO FEATURES
94
AUDIO FEATURES
87
CONNECTIVITY
84
MULTIZONE
81
MISCELLANEOUS
68
RADIO
92
OVERALL
87

Amplifier score is based on power ratings, minimum impedance load, power supply, transformer type, total harmonic distortion, damping factor, signal to noise ratio and other small details. Audio score depends on the number of channels, front wide channel support, maximum channel processing, support of audio formats, DAC specifications, room calibration algorithm... Video score is based on HDR, Dolby Vision and 4K passthrough, upscaling, analog to HDMI upconversion. Connectivity score is defined from all wired and wireless inputs and outputs, internet and bluetooth connections, HEOS, SONOS and others. Multizone score depends on the number of zones with their outputs. Radio score is evaluated form digital radio support and analog tuner with its frequency range, signal to noise ratio, harmonic distortion...

Advantage of Onkyo TX-RZ630

This section shows those features and specifications which are the reason to choose Onkyo TX-RZ630 over Onkyo TX-RZ620.

Onkyo TX-RZ630 has more channels, more channel processing, more advanced room correction system, more zones and bigger power supply. It supports SONOS.

Onkyo TX-RZ630 vs Onkyo TX-RZ620
More Channels 9.2 vs 7.2
More Channel Processing 9.1 vs 7.1
More Tone Control Channels All Channels vs Front L/R Channels
More Advanced Auto Speaker Calibration System AccuEQ Advance with AccuReflex™ vs AccuEQ with AccuReflex™
Works with SONOS requires firmware update & Sonos Connect vs
AirPlay AirPlay 2 after firmware update vs AirPlay
More HDMI Outputs 2 (1 Main, 1 Sub/Zone2) vs 2 (simultaneous)
More Zones 3 vs 2
More Powered Zones 2 and 3 vs 2
Zone 2 Outs HDMI, RCA Line Out vs RCA Pre/Line Out
Whole House Mode vs
Bigger Power Supply 740 W vs 580 W

Advantage of Onkyo TX-RZ620

This section shows those features and specifications which are the reason to choose Onkyo TX-RZ620 over Onkyo TX-RZ630.

Onkyo TX-RZ620 has more power per channel.

Onkyo TX-RZ630 vs Onkyo TX-RZ620
Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 90 W (0.08% THD) vs 100 W (0.08% THD)

Common Strengths and Weaknesses

Here we list common strengths and weaknesses of both receivers.

STRENGTHS
  Dolby Atmos
  DTS:X
  DSD via HDMI
  Auto Speaker Calibration System with Mic.
  HDR10
  Dolby Vision
  4K or 8K Video Passthrough
  Analog To HDMI Upconversion
  Chromecast Built-In
  Ethernet
  Wi-Fi
  Bluetooth
  New HDCP Version
  Many HDMI Inputs
  USB Input
  Many Analog Audio Line Inputs
  Phono Input
  Composite Video Inputs
  Component Video Inputs
  Zones
  Analog Tuner
  Pandora
  Spotify
  Tidal
WEAKNESSES
  No Front Wide Channel Support
  No Dolby Atmos Height Virtualization
  No IMAX Enhanced
  No Auro 3D with Auro-Matic Upmixer
  No HDR10+
  No 4K or 8K Video Upscaling
  Does not Work with Amazon Alexa
  No eARC
  Few 8K Inputs
  No Analog Pre-Outs

Selected Features

Amplifier

Onkyo TX-RZ630 has 9 channel and Onkyo TX-RZ620 has 7 channel amplifiers. Onkyo TX-RZ630 delivers 90 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and Onkyo TX-RZ620 delivers 100 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and they both have stable performance at 4 Ω load. Since 2016 all receiver manufacturers have dropped front wide channel support and these models are no exceptions.


Video Features

Both receivers support 4K passthrough up to 60p. The receivers support HDR10, Dolby Vision.


HDR10

High-dynamic-range (HDR) video has greater dynamic range than standard-dynamic-range (SDR) video with brigter whites and deeper blacks. HDR10 was announced on August 27, 2015, by the Consumer Technology Association and 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 up to 1000 nits of brightness and 10-bit color which corresponds to 1024 shades of the primary RGB colors.


Dolby Vision

Dolby Vision is an update to HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to 10,000 nits maximum brightness on a scene-by-scene or frame-by-frame basis and supports up to 12-bit color depth (4096 shades of RGB) and 8K resolution.


Dolby Atmos and Dolby Surround upmixer

Onkyo TX-RZ630 and Onkyo TX-RZ620 support Dolby Atmos with its Dolby Surround upmixer. The Onkyo TX-RZ630 can be configured upto 7.1.2 or 5.1.4 channels using internal amplifiers and the Onkyo TX-RZ620 can be configured upto 5.1.2 channels using internal amplifiers.

Dolby Atmos is the first cinematic audio format in which sounds exist as individual entities, called audio objects. In Dolby Atmos, any sound - the helicopter, a car screeching around a corner, a melodic bird call - 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. You'll feel like you're inside the action, in ways you've never experienced before.

Dolby Atmos for the home represents every sound in the original cinema mix as an audio object. Extensions to the Dolby Audio™ codecs, along with an advanced scalable algorithm, allow Dolby Atmos to be delivered via Blu-ray Disc and streaming media. A spatially-coded substream is added to Dolby TrueHD or Dolby Digital Plus. A Dolby Atmos audio/video receiver (AVR) adapts the cinema experience to your home theater from seven speakers to as many as 34 in 24.1.10 configuration, recreating the original artistic concept. 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.

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 and Neural:X upmixer

Onkyo TX-RZ630 and Onkyo TX-RZ620 support DTS:X with its Neural:X upmixer. The Onkyo TX-RZ630 can be configured upto 7.1.2 or 5.1.4 channels using internal amplifiers. The Onkyo TX-RZ620 can be configured upto 5.1.2 channels using internal amplifiers.

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 is an 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.


Dynamic Audio Amplification

Onkyo TX-RZ630 and Onkyo TX-RZ620 feature Dynamic Audio Amplification which is Onkyo’s amplification philosophy that focuses on capturing the energy and dynamism contained in the audio signal and reproducing it without loss. Audio signals are not static like a test tone, but rather a countless collection of constantly moving waves. While static measurements such as S/N ratio and Total Harmonic Distortion are important, Onkyo believes that excellent dynamic and transient response is the key to emotionally involving sound. Dynamism - the “life” in music - is achieved when the amp can respond to changes in the signal instantaneously, so notes start and stop naturally and the nuances in attack, decay, sustain, and release are voiced with conviction. Onkyo home theater receivers represent the culmination of almost 70 years’ experience in amplifier design. The unique elements of their amplification system comprise high-current, low-impedance architecture to accurately control large speaker cones while enabling instantaneous response to dynamic changes, and discrete wide-range amplifier circuit topology to eliminate phase shift for clear and accurate audio imaging.


Advanced Music Optimizer

Compressed music enhancement in Onkyo TX-RZ630 and Onkyo TX-RZ620 is done by Onkyo’s Advanced Music Optimizer. While MP3 or AAC files may sound fine through the headphones of your portable digital player, the limitations of these files can be exposed when played back through a quality home entertainment system. This is because a significant amount of high-frequency bit information is lost during the file-compression process. To counter this, Onkyo has designed the Advanced Music Optimizer to compensate for lost bit information and improve the quality of compressed audio signals. This results in a clearer and more expansive sound. Also included in this technology is a loudness correction feature that further improves the audio character of compressed files.


Phase-Matching Bass Boost

Onkyo TX-RZ620 features Phase-Matching Bass Boost. The negative effects of phase-shift or the timing difference between sound waves of different frequencies can sometimes be heard in audio players when corners are cut in order to increase bass response. While most audio systems have some form of low-frequency enhancement system, often a bigger bass sound comes at the expense of mid-range clarity, and results in a smeared or muddy sound. Onkyo’s Phase-Matching Bass Boost technology avoids this problem by improving the phase timing to preserve the natural clarity of the mid-range allowing vocals and strings to shine while maintaining a smooth, powerful bass response at all volume levels.


Connectivity

Onkyo TX-RZ630

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Onkyo TX-RZ630 can be connected to internet using ethernet cable or built-in wi-fi adapter. It can also connect to bluetooth devices via built-in bluetooth adapter. The Receiver works with SONOS and supports AirPlay 2 after firmware update. It has 7 HDMI inputs with HDCP 2.2 copy protection. There is a phono input with built-in phono stage for connecting the cartridge output of the turntable directly to the Receiver.

Front panel has HDMI and Mini-Jack inputs.

Onkyo TX-RZ620

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Onkyo TX-RZ620 can be connected to internet using ethernet cable or built-in wi-fi adapter. It can also connect to bluetooth devices via built-in bluetooth adapter. The Receiver supports AirPlay. It has 7 HDMI inputs with HDCP 2.2 copy protection. There is a phono input with built-in phono stage for connecting the cartridge output of the turntable directly to the Receiver.

Front panel has HDMI and Mini-Jack inputs.

Specifications

And in the end let us list the detailed specifications of the receivers side-by-side.

Note: The following table shows only those details which are applicable for both models and excludes the ones that are applicable for only one model. If you want to see a full list of specs for each model please visit their individual pages here - Onkyo TX-RZ630 and here - Onkyo TX-RZ620.

BASICS Onkyo TX-RZ630 Onkyo TX-RZ620
BrandOnkyoOnkyo
ModelTX-RZ630TX-RZ620
TypeA/V ReceiverA/V Receiver
CountryNorth AmericaNorth America
Release Year20182017
AMPLIFIER Onkyo TX-RZ630 Onkyo TX-RZ620
Channels9.27.2
Front Wide Channel Support
Dynamic Audio Amplification
Non-Phase Shift Amplifier
VLSC (Vector Linear Shaping Circuitry) Front L/R channels Front L/R channels
THX™ Certification
Continuous 6 Ω Rated
Certified 4 Ω Performance
Discrete Output Stage Circuitry
Independent Block Construction (Amp/Preprocessor)
Bi-amp Capability
BTL (Bridged Transless or Bridging)
AUDIO Onkyo TX-RZ630 Onkyo TX-RZ620
Digital Signal Processing (DSP) Engine32-bit Digital Signal Processing Engines32-bit Digital Signal Processing Engines
DACAKM AK4458AKM AK4458
Maximum Channel Processing9.17.1
Air Studios Monitor Certification
Dolby Atmos
Dolby Atmos Height Virtualization
Dolby Atmos Music
Dolby TrueHD
Dolby Digital Plus
Dolby Surround Upmixer
Dolby Pro Logic
Dolby Digital EX
THX Listening Modes
DTS:X
DTS Neural:X
DTS Virtual:X
DTS Neo
DTS-HD Master Audio
DTS-HD High Resolution Audio
DTS 96/24
DTS Express
DTS-ES
IMAX Enhanced
Auro 3D with Auro-Matic Upmixer
PCM 2-ch/Multi-ch Input 2-ch/Multi-ch Input
Music Playback via USBFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, AAC, Dolby TrueHDFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, AAC, Dolby TrueHD
High Resolution Music Playback via USB and/or Network up to 192 kHz up to 192 kHz
High Resolution Audio Formats via USBFLAC, WAV, Apple Lossless, DSD, AIFF, AAC, Dolby TrueHDFLAC, WAV, Apple Lossless, DSD, AIFF, AAC, Dolby TrueHD
Multi-Channel Music File Playback via USB
Gapless Playback
DSD via HDMI 2-ch/Multi-ch Input 2-ch/Multi-ch Input
DSD via USB 2-ch Input 2-ch Input
DSD to PCM Converter
USB DAC
Jitter Reduction PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
DTS Dialog Control
Dialog Enhancement
Dialog Normalization
Dialogue Lift
Tone Control All Channels Front L/R Channels
Compressed Music Enhancer Advanced Music Optimizer (bluetooth included) Advanced Music Optimizer (bluetooth included)
High-resolution Music Enhancer
Audyssey Dynamic EQ
Audyssey Dynamic Volume
Audyssey LFC
Audyssey Sub EQ HT
Audyssey DSX
Direct Mode
Pure Audio Mode
Pure Direct Analog Path Mode
Virtual Speakers T-D (Theater-Dimensional) T-D (Theater-Dimensional)
CALIBRATION Onkyo TX-RZ630 Onkyo TX-RZ620
Auto Speaker Calibration System with Mic. AccuEQ Advance with AccuReflex™ AccuEQ with AccuReflex™
VIDEO Onkyo TX-RZ630 Onkyo TX-RZ620
HDR10
HDR10+
BT.2020 color space
Dolby Vision
HLG (Hybrid Log Gamma)
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 (RGB/YCbCr4:4:4)up to 4K/60p (RGB/YCbCr4:4:4)
Video Signal Upscaling
Analog To HDMI Upconversion Component**, Composite Component**, Composite
Component Video Upscaling
Analog to Analog Video conversion
Component Video Maximum Resolution480i/576i480i/576i
isf Certified Calibration Control
CONNECTIVITY Onkyo TX-RZ630 Onkyo TX-RZ620
MHL Input
FireConnect
FlareConnect
Chromecast Built-In
DTS Play-Fi via Onkyo Music Control app
Works with Amazon Alexa
Works with SONOS requires firmware update & Sonos Connect
AirPlay AirPlay 2 after firmware update AirPlay
Apple Product Connection iPod, iPhone and iPad iPod, iPhone and iPad
Remote AppOnkyo Onkyo Controller and Music Control appsOnkyo Remote App for iPod touch/iPhone and Android-Powered Devices
InstaPrevue Input Source Prevue
Ethernet
Ethernet Switch
Wi-Fi
Bluetooth SBC, AAC SBC, AAC
HDBaseT Compatible
Enhanced ARC
HDCP Version2.22.2
HDMI Inputs7 (1 front)7 (1 front)
HDMI Outputs2 (1 Main, 1 Sub/Zone2)2 (simultaneous)
8K Inputs
USB Input1 (Rear)1 (Rear)
USB DC Out Port
Analog Audio Line Input7 (1 Front)6
Analog Audio Line Output
Phono Input
Optical In22
Optical Out
Coaxial In/Out1 / 1 /
Composite Video Input22
Composite Video Output
S-Video Input
S-Video Output
Component Video Input22
Component Video Output
PC In
Multi-Channel Input
Analog Pre-Outs0.20.2
XLR Inputs
XLR Pre-outs
Front A/V InputsHDMI, Mini-JackHDMI, Mini-Jack
Speaker A/B
Headphone Out 6.3 mm 6.3 mm
ZONES Onkyo TX-RZ630 Onkyo TX-RZ620
Zones32
Powered Zones 2 and 3 2
Zone 2HDMI, RCA Line OutRCA Pre/Line Out
Whole House Mode
RS-232
+12V Trigger Output1 (MAIN, 100 mA)1 (MAIN, 100 mA)
Remote (IR) Input/Output1 / 01 / 0
MISC Onkyo TX-RZ630 Onkyo TX-RZ620
On-Screen Display Graphical User Interface with Overlaid On-Screen Display (OSD) via HDMI Graphical User Interface with Overlaid On-Screen Display (OSD) via HDMI
Detachable Power Cord
uport
ONKYO-RI System Control
RIHD (Remote Interactive Over HDMI)
Smart Grid-Ready
RADIO Onkyo TX-RZ630 Onkyo TX-RZ620
Analog Tuner FM/AM FM/AM
Presets4040
Digital Radio
Internet Radio TuneIn TuneIn
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM Internet Radio
CONSTRUCTION Onkyo TX-RZ630 Onkyo TX-RZ620
Solid Aluminum Front
Speaker Terminals99
Large Speaker Terminals99
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
18mm Pitch High Grade Pre-outs
19mm-Pitch Audio Inputs
Gold plated RCA terminals
POWER Onkyo TX-RZ630 Onkyo TX-RZ620
Power SupplyAC 120 V, 60 HzAC 120 V, 60 Hz
H.C.P.S. (High Current Power Supply) EI Transformer
Toroidal Transformer
Power Consumption740 W580 W
Standby Power0.15 W0.15 W
GENERAL Onkyo TX-RZ630 Onkyo TX-RZ620
ECO Mode / Hybrid Standby Function
Dimensions (W x H x D)435 mm x 177 mm x 379.5 mm
17-1/8" x 6-15/16" x 14-15/16"
435 mm x 177 mm x 378 mm
17-1/8" x 6-15/16" x 14-7/8"
Weight10.2 kg (22.5 lbs)10.0 kg (22.0 lbs)
Warranty3 Years3 Years
SPECS Onkyo TX-RZ630 Onkyo TX-RZ620
Power Output (8 Ω, 20 Hz - 20 kHz, 290 W (0.08% THD)100 W (0.08% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA)215 W (10% THD)215 W (10% THD)
Dynamic Power per Channel (3 Ω, Front)240 W240 W
Dynamic Power per Channel (4 Ω, Front)210 W210 W
Dynamic Power per Channel (8 Ω, Front)120 W120 W
THD0.08% (20 Hz - 20 kHz, Half power)0.08% (20 Hz - 20 kHz, Half power)
Input Sensitivity and Impedance (Line)200 mV/47 kΩ (1 kHz, 100 W/8 Ω)200 mV/47 kΩ (1 kHz, 100 W/8 Ω)
Input Sensitivity and Impedance (Phono MM)3.5 mV/47 kΩ3.5 mV/47 kΩ
Rated Headphone Power Output80 mW (32 Ω, 1 kHz, 10% THD)80 mW (32 Ω, 1 kHz, 10% THD)
Phono Overload70 mV (MM, 1 kHz 0.5%)70 mV (MM, 1 kHz 0.5%)
S/N Ratio (Line, IHF-A)106 dB106 dB
S/N Ratio (Phono MM, IHF-A)80 dB80 dB
Frequency Response (Analog In)5 Hz - 100 kHz/+1 dB, -3 dB (Direct)5 Hz - 100 kHz/+1 dB, -3 dB (Direct)
DSD Sampling Rates via HDMI2.8 MHz2.8 MHz
DSD Sampling Rates via USB2.8 MHz, 5.6 MHz2.8 MHz, 5.6 MHz
Video Input Sensitivity/Output Level and Impedance1 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)
0.7 Vp-p/75 Ω (Component PB/CB, PR/CR)
1 Vp-p/75 Ω (Composite)
Ethernet Standard10BASE-T/100BASE-TX10BASE-T/100BASE-TX
Wi-Fi StandardIEEE 802.11 a/b/g/nIEEE 802.11 a/b/g/n
Wi-Fi Terminal Frequency5 GHz, 2.4 GHz5 GHz, 2.4 GHz
Bluetooth Version4․1 + LE4․1 + LE
Bluetooth Frequency2.4 GHz2.4 GHz
USB TerminalVer. 2.0, 5 V, 1 AVer. 2.0, 5 V, 1 A
FM Frequency87.5 MHz - 107.9 MHz87.5 MHz - 107.9 MHz
AM Frequency530 kHz - 1710 kHz530 kHz - 1710 kHz

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

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