1-on-1 Comparison

Side-by-Side Comparison

Onkyo TX-NR838 (USA version)

SCORE:
84

Highlights

  • 7.2 channels
  • 7.1 channel processing
  • 130 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
  • THX Select™2 Plus certified
  • Dolby Atmos capable
  • 4K Upscaling, 4K Passthrough
  • AirPlay via optional Onkyo RI Dock DS-A5 (sold separately), DLNA
  • 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

Onkyo TX-NR838 was introduced in 2014. It is equipped with 7 channel amplifier with 130 W (8 Ω, 20 Hz - 20 kHz and 2 channel driven) power per channel and is capable of 7.1 maximum channel processing. It supports Dolby Atmos, passes 4K/60Hz and upscales up to 4K/30p (Marvell Qdeo) 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.

AMPLIFIER
93
VIDEO FEATURES
71
AUDIO FEATURES
84
CONNECTIVITY
86
MULTIZONE
88
MISCELLANEOUS
75
RADIO
90
OVERALL
84

Pros and Cons

In this section we present pros and cons of Onkyo TX-NR838.

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

Predecessor

Here we are comparing Onkyo TX-NR838 to its predecessor TX-NR828 and displaying the major changes.

UPGRADES Onkyo TX-NR838 vs Onkyo TX-NR828
Dolby Atmos vs
Dolby Surround Upmixer vs
Gapless Playback vs
Pure Direct Analog Path Mode vs
Video Signal Passthrough up to 4K/60p (YCbCr 4:2:0) vs up to 4K/30p
More HDMI Outputs 2 (1 Main, 1 Sub/Zone2) vs 2 (simultaneous)
Zone 2 Outs HDMI, RCA Pre/Line Out vs RCA Line Out
Zone 3 Outs RCA Pre/Line Out vs RCA Line Out
Smart Grid-Ready vs
Higher DSD Sampling Rate via HDMI 2.8 MHz, 5.6 MHz vs 2.8 MHz

DOWNGRADES Onkyo TX-NR838 vs Onkyo TX-NR828
Dolby Pro Logic vs PLIIz
High Resolution Music Playback via USB up to 96 kHz vs up to 192 kHz
High Resolution Audio Formats via USB FLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC vs FLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC, LPCM
Audyssey Dynamic EQ vs
Audyssey Dynamic Volume vs
Audyssey DSX vs
isf Certified Calibration Control vs
Less HDMI Inputs 7 (1 front) vs 8 (1 front)
Less Composite Video Inputs 4 (1 front) vs 5 (1 front)
Less Component Video Inputs 1 vs 2
Less Powered Zones 2 vs 2 and 3
Bi-directional Remote Setup via GUI vs
Activity Based Remote vs

For more detailed comparison between the models please visit Onkyo TX-NR838 vs Onkyo TX-NR828.

Audio Section

7 channel Amplifier

Onkyo TX-NR838 features 7 channel power amplifier. It is rated at 130 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.

  • WRAT (Wide Range Amp Technology): Onkyo TX-NR838 features Onkyo’s Wide Range Amp Technology (WRAT) circuit layout that prevents phase shifting by pushing the roll-off point higher than the listening-level frequency. Amplifying sound without phase shift creates an uncommonly well-focused and realistic audio image. If phase shift occurs and signal timing is not accurate, then neither is the resulting audio image.

THX Select™2 Plus certified

Onkyo TX-NR838 is THX Select™2 Plus certified. This means that it is ideally suited for a room where the screen-to-seat viewing distance is approximately 3 to 4 meters, and the room size is approximately 56 cubic meters.

  • THX™ Certification: THX™ Certification offers optimal performance, superior quality and seamless integration. THX works with partners from the ground up, so that certified products deliver professional quality audio-visual experiences right out of the box. They only certify the very best products with uncompromised quality, performance and consistency. They ensure that THX certified devices play well with lower performing devices and components. THX listening modes make the receiver to have one speaker set up for movies, music and games. They are tested for power output, bass management, signal-to-noise ratio and feature THX Loudness Plus, Boundary Gain Compensation, Timbre Matching and RE-EQ.
  • Power Output: Power output is tested to ensure the receiver accurately plays source material at THX Reference Level in every input and mode and at every sampling rate for all possible playback combinations selected by the listener.
  • Frequency Response: THX has strict requirements for frequency response to ensure that you hear all the details in high-resolution tracks, ensures dialog in movies, and vocals in music are clear while maintaining deep, impactful bass output that doesn’t overpower the listening experience.
  • Signal-to-Noise Ratio: THX tests the signal-to-noise ratio to ensure the unit is designed to have low noise performance with very little to no audible hiss from the speakers.
  • Bass Management: THX requires an 80Hz crossover point in the setup menu to ensure proper bass management in every THX Certified AVR. This setting confirms that the subwoofer handles low frequencies, freeing up the loudspeakers to handle mids and highs.
  • THX Loudness Plus™: THX Loudness Plus™ is a volume control technology featured in THX Certified Dominus, THX Certified Ultra and THX Certified Select AV Receivers, and preamplifiers that automatically adjusts the front-to-back speaker level relationship as you turn the volume down. With THX Loudness Plus, home theater audiences can now experience the rich details of surround sound at any volume level.
  • Boundary Gain Compensation: Sitting near a wall may result in increased acoustic levels at the lower frequencies. BGC corrects the way low frequency sound is perceived when seated near a wall. This results in a more accurate bass response.
  • Timbre Matching: Your ears hear different tonal qualities in sounds coming from different directions. Timbre Matching restores the frequency balance between your front and surround speakers ensuring seamless and smooth panning between the front to back of the room.
  • RE-EQ: Many movie soundtracks are mixed in studios for playback in large cinema auditoriums with an array of speakers. When played on home systems, they may appear abrasive and edgy. Re-EQ establishes a more accurate tonal balance when enjoying movies in your home.

Speaker Configurations

Onkyo TX-NR838'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.
  • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
  • 5.2, 7.2 with internal amplifier.
  • Front Wide Channel support: Onkyo TX-NR838 supports front wide channels. With the presence of two front wide speakers you can enhance the front surround stage. The following speaker configurations are available for front wide channels - 7.2.
  • 2-ch Bi-Amp: Onkyo TX-NR838 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

Onkyo TX-NR838 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.

Sound Processing

  • Advanced Music Optimizer: Compressed music enhancement in Onkyo TX-NR838 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.

Room Calibration

Onkyo TX-NR838 comes with AccuEQ room correction system and includes the calibration microphone.

  • AccuEQ: First, AccuEQ detects the presence of speakers and evaluates the impedance of each. Next, it pinpoints their distance relative to the main listening position using the mic and sets suitable sound-pressure levels. Then it selects the optimal crossover frequency so that deeper bass rolls smoothly off to the subwoofer. Finally, AccuEQ performs frequency response equalization based on room-acoustic and speaker data collected via microphone. The sound-field is now tailored around the listening position, resulting in a more immersive and realistic in-film experience.

Video Section

HDMI

Onkyo TX-NR838 features 7 HDMI inputs. It has 2 outputs: 1 Main and 1 Sub/Zone2.

  • 4K/60Hz Passthrough: All inputs pass up to 4K/60p (YCbCr 4:2:0) video signal.
  • 4K Upscaling: Onkyo TX-NR838 can upscale up to 4K/30p (Marvell Qdeo) from HDMI and analog sources.
  • Analog To HDMI Upconversion: The a/v receiver supports video upconversion, so you can connect your analog Component and Composite video sources and Onkyo TX-NR838 will output them via HDMI. This means that you will need only one HDMI cable to connect to your TV.
  • HDCP 2.2 Copy Protection: All inputs and outputs are HDCP 2.2 compliant which is a requirement for 4K/HDR copy-protected content transmission.
  • 3D Ready: Onkyo TX-NR838 is able to pass 3D video through HDMI.

Multi-zone Playback

Onkyo TX-NR838 offers multi-zone playback which allows you to play different input sources in 3 different rooms.


Zone 2

  • Powered Zone 2: You can use the unit's 2 amplifier channels by connecting Zone 2 speakers directly to the speaker terminals. The remaining 5 channels will be left for main zone amplification.
  • HDMI Output: Onkyo TX-NR838 offers HDMI output for Zone 2. This means that it can send two different HDMI signals to two displays.
  • Audio Pre/Line Output: If you have a dedicated amplifier for Zone 2 you can connect it to the a/v receiver via pre/line outs and use "pre out" option to control volume from the a/v receiver or use "line out" option - send fixed signal and then control volume on the Zone 2 amplifier.

Zone 3

  • Audio Pre/Line Output: If you have a dedicated amplifier for Zone 2 you can connect it to the a/v receiver via pre/line outs and use "pre out" option to control volume from the a/v receiver or use "line out" option - send fixed signal and then control volume on the Zone 3 amplifier.

Inputs and Outputs

Audio

  • Analog Pre-Outs: Onkyo TX-NR838 has 7.2 preamplifier outputs which allow you to connect the a/v receiver to the external power amplifier. You may want to use a high quality external amplifier for certain channels, usually for front L/R and center, and use the a/v receiver to power the rest.
  • Analog Line Inputs: There are 7 line inputs for analog audio connection.
  • Digital Inputs and Outputs: 1 optical input, 2 optical outputs and 3 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: 7 (1 front)   Outputs: 2 (1 Main, 1 Sub/Zone2)
    8K Inputs: 0
  • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
  • Inputs: 4   Outputs: 1
  • Component Video: Component video connection gives you the higher quality video compared to the composite video connection. So in case your old DVD player and other equipment do not have an HDMI output but have Component video output use this connection over the composite one. Onkyo TX-NR838 supports up to 1080i resolution on Component video connectors.
  • Inputs: 1   Outputs: 1
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Specifications

Here we list all the available features and specifications of Onkyo TX-NR838.

BASICS
BrandOnkyo
ModelTX-NR838
TypeA/V Receiver
CountryUSA
Release Year2014
AMPLIFIER
Channels7.2
Front Wide Channel Support
WRAT (Wide Range Amplifier Technology)
VLSC (Vector Linear Shaping Circuitry)
Optimum Gain Volume Circuitry
THX™ Certification Select™2 Plus
Continuous 6 Ω Rated
Certified 4 Ω Performance
Discrete Output Stage Circuitry
3-Stage Inverted Darlington Circuitry All Channels
PUSH-PULL Design
Independent Block Construction (Amp/Preprocessor)
Bi-amp Capability
BTL (Bridged Transless or Bridging)
AUDIO
Digital Signal Processing (DSP) EngineDual 32-bit DSP for Powerful Advanced Processing
DACBurr-Brown
DAC Specs192 kHz/24 Bit
Maximum Channel Processing7.1
Air Studios Monitor Certification
Dolby Atmos
Dolby Atmos Height Virtualization
Dolby Atmos Music
Dolby TrueHD
Dolby Digital Plus
Dolby Surround Upmixer
Dolby Pro Logic
Surround EX also known as Dolby Digital Surround EX
DTS:X
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
Music Playback via USBFLAC, WAV, Apple Lossless, WMA, WMA Lossless, Ogg, MP3, DSD, AAC, LPCM, Dolby TruHD
High Resolution Music Playback via USB and/or Network up to 96 kHz
High Resolution Audio Formats via USBFLAC, WAV, WMA Lossless, Apple Lossless, DSD, AAC
Gapless Playback
DSD via HDMI 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 Dialog Control
Dialog Enhancement
Dialog Level Adjustment
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
Pure Audio Mode
Pure Direct Analog Path Mode
Virtual Speakers T-D (Theater-Dimensional)
Independent Subwoofer Outputs
CALIBRATION
Auto Speaker Calibration System with Mic. AccuEQ
VIDEO
Enhanced ARC
HDCP Version2.2
HDR10
HDR10+
Dynamic HDR
Dolby Vision
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)
3-D Ready
Video Signal Passthroughup to 4K/60p (YCbCr 4:2:0)
Video Signal Upscaling up to 4K/30p (Marvell Qdeo)
Analog To HDMI Upconversion Component**, Composite
Component Video Upscaling
Analog to Analog Video conversion
Component Video Maximum Resolution1080i
isf Certified Calibration Control
CONNECTIVITY
MHL Input Front HDMI
DLNA 1.5
FireConnect
FlareConnect
Chromecast Built-In
DTS Play-Fi
Works with Amazon Alexa
Works with SONOS
AirPlay AirPlay via optional Onkyo RI Dock DS-A5 (sold separately)
Apple Product Connection iPod and iPhone via optional Onkyo RI Dock DS-A5 (sold separately)
Remote AppOnkyo Remote App for iPod touch/iPhone and Android-Powered Devices
InstaPrevue Input Source Prevue
Ethernet
Ethernet Switch
Wi-Fi
Bluetooth
HDBaseT Compatible
HDMI Inputs7 (1 front)
HDMI Outputs2 (1 Main, 1 Sub/Zone2)
8K Inputs
USB Input1 (Front)
USB DC Out Port
RCA Line Input7 (1 front)
RCA Line Output
XLR Line Inputs
Phono Input
Optical Inputs2
Optical Outputs
Coaxial Inputs3
Composite Video Input4 (1 front)
Composite Video Output1
S-Video Input
S-Video Output
Component Video Input1
Component Video Output1
PC In
Multi-Channel Input
RCA Pre-Outs7.2
XLR Pre-outs
Front A/V InputsHDMI/MHL, USB, Composite Video, RCA Audio
Speaker A/B
Headphone Out6.3 mm (1/4")
ZONES
Zones3
Powered Zones 2
Zone 2 OutsHDMI, RCA Pre/Line Out
Zone 3 OutsRCA Pre/Line Out
Whole House Mode
RS-232C Interface
+12V Trigger Output1 (Zone2)
Remote (IR) Input/Output1 / 0
MISC
On-Screen Display Advanced "Home" GUI
Detachable Power Cord
uport
ONKYO-RI System Control
RIHD (Remote Interactive Over HDMI)
Pre-Pro/Learning Remote /
On Screen Remote Programming
Bi-directional Remote Setup via GUI
Activity Based Remote
Smart Grid-Ready
RADIO
Analog Tuner FM/AM
Presets40
Digital Radio
Internet Radio TuneIn
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM Internet Radio
CONSTRUCTION
Solid Aluminum Front
Speaker Terminals11
Large Speaker Terminals11
Color-Coded Speaker Terminals
Transparent High-Grade Speaker Terminals
18mm Pitch High Grade Pre-outs
19mm-Pitch Audio Inputs
Gold plated RCA terminals
POWER
Power SupplyAC 120 V, 60 Hz
Independent Power Supply2
H.C.P.S. (High Current Power Supply) Massive High Power Transformer
Toroidal Transformer
Power Consumption8.1 A
No Sound Power90 W
Standby Power0.1 W
Capacitor Bank15,000 µF
GENERAL
ECO Mode / Hybrid Standby Function
Dimensions (W x H x D)435 mm x 198.5 mm x 400 mm
17-1/8" x 7-13/16" x 15-3/4"
Weight15.5 kg (34.2 lbs)
Warranty2 Years
SPECS
Power Output (8 Ω, 20 Hz - 20 kHz, 2130 W (0.08% THD)
Power Output (6 Ω, 20 Hz - 20 kHz, 1 channel driven, JEITA)145 W (0.08% THD)
Power Output (6 Ω, 1 kHz, 2160 W (0.7% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA)215 W
Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)180 W (1% THD)
Dynamic Power per Channel (3 Ω, Front)300 W
Dynamic Power per Channel (4 Ω, Front)250 W
Dynamic Power per Channel (8 Ω, Front)150 W
THD0.08% (20 Hz - 20 kHz, Half power)
Damping Factor60 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance (Line)200 mV/47 kΩ (Line)
Input Sensitivity and Impedance (Phono MM)2.5 mV/47 kΩ
Rated Preout Level and Impedance200 mV/470 Ω
Maximum Preout Level and Impedance4.6 V/470 Ω
Phono Overload70 mV (MM, 1kHz, 0.5% Direct)
S/N Ratio (Line, IHF-A)106 dB
S/N Ratio (Phono MM, IHF-A)80 dB
Frequency Response (Analog In)5 Hz - 100 kHz/+1 dB, -3 dB (Direct Mode)
DSD Sampling Rates via HDMI2.8 MHz, 5.6 MHz
DSD Sampling Rates via USB2.8 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)
Video Frequency Response5 Hz - 100 MHz/+0 dB, -3 dB (Component)
Ethernet Standard10BASE-T/100BASE-TX
Wi-Fi StandardIEEE 802.11 b/g/n
Wi-Fi Terminal Frequency2.4 GHz
Bluetooth Version2․1 + EDR
Bluetooth Frequency2.4 GHz
FM Frequency87.5 MHz - 107.9 MHz
AM Frequency522/530 kHz - 1611/1710 kHz

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

Successor

In 2015 Onkyo TX-NR838 was replaced by TX-RZ800. Let us now have a look at some important changes that the successor brought.


UPGRADES Onkyo TX-RZ800 vs Onkyo TX-NR838
VLSC (Vector Linear Shaping Circuitry) All Channels vs
Independent Block Construction (Amp/Preprocessor) vs
Higher DAC Specs 384 kHz/32 Bit vs 192 kHz/24 Bit
DTS:X vs
DTS Neural:X vs
DTS Dialog Control vs
More Advanced Auto Speaker Calibration System AccuEQ Advance vs AccuEQ
HDR10 vs
BT.2020 color space vs
AirPlay AirPlay vs AirPlay via optional Onkyo RI Dock DS-A5 (sold separately)
More HDMI Inputs 8 (1 front) vs 7 (1 front)
More RCA Line Inputs 8 vs 7 (1 front)
More RCA Line Outputs 1 vs
More Optical Outputs vs
More Component Video Inputs 2 vs 1
Deezer vs
Higher Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC) 135 W (0.08% THD) vs 130 W (0.08% THD)
Higher Power Output (6 Ω, 1 kHz, 1 channel driven, IEC) 185 W (1% THD) vs 180 W (1% THD)
Higher Rated Preout Level 1 V/470 Ω vs 200 mV/470 Ω
Higher DSD Sampling Rate via USB 2.8 MHz vs 2.8 MHz

DOWNGRADES Onkyo TX-RZ800 vs Onkyo TX-NR838
Front Wide Channel Support vs
DTS Neo vs Neo:6
Dialog Normalization vs
Video Signal Upscaling vs up to 4K/30p (Marvell Qdeo)
Component Video Maximum Resolution 1080i vs 1080i
MHL Input vs Front HDMI
Less Coaxial Inputs/Outputs 2 vs 3
Less Composite Video Inputs 3 vs 4 (1 front)
Front A/V Inputs HDMI vs HDMI/MHL, USB, Composite Video, RCA Audio
Zone 3 Outs RCA Line Out vs RCA Pre/Line Out
Smaller Power Supply 7.8 A vs 8.1 A
Lower Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 215 W vs 215 W
Lower Damping Factor 40 (Front, 1 kHz, 8 Ω) vs 60 (Front, 1 kHz, 8 Ω)

For more detailed comparison between the models please visit Onkyo TX-NR838 vs Onkyo TX-RZ800.

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