Onkyo TX-SR383 (North American version)

•   Overview
•   Pros and Cons
•   Predecessor
•   Audio Section
•   Video Section
•   Multi-zone Playback
•   Inputs and Outputs
•   Specifications
•   Successor

Onkyo TX-SR383 was introduced in 2018. 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 video signal.

We evaluated the a/v receiver and gave 74 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.

In this section we present pros and cons of Onkyo TX-SR383.

Here we are comparing Onkyo TX-SR383 to its predecessor TX-SR373 and displaying the major changes.

UPGRADES	Onkyo TX-SR383	vs	Onkyo TX-SR373
More Channels	7.2	vs	5.2
More Channel Processing	7.1	vs	5.1
Dolby Atmos		vs
Dolby Surround Upmixer		vs
DTS:X		vs
DTS Neural:X		vs
DTS Express		vs
DTS-ES		vs
More Zones	2	vs	1
More Speaker Terminals	7	vs	5
Bigger Power Supply	270 W	vs	210 W
Wider AM Frequency Range	530 kHz - 1710 kHz	vs	530 kHz - 1700 kHz

DOWNGRADES	Onkyo TX-SR383	vs	Onkyo TX-SR373
Dolby Pro Logic		vs	PLII
DTS Neo		vs	Neo:6

For more detailed comparison between the models please visit Onkyo TX-SR383 vs Onkyo TX-SR373.

7 channel Amplifier

Onkyo TX-SR383 features 7 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).

Speaker Configurations

Onkyo TX-SR383'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.

Dolby Atmos

Onkyo TX-SR383 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.

DTS:X

Onkyo TX-SR383 supports DTS:X. 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: DTS 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.

Sound Processing

• Advanced Music Optimizer: Compressed music enhancement in Onkyo TX-SR383 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-SR383 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.

HDMI

Onkyo TX-SR383 features 4 HDMI inputs. It has 1 output.

• 4K/60Hz Passthrough: All inputs pass up to 4K/60p (4:4:4) video signal.
• 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 2.2 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-SR383 is able to pass 3D video through HDMI.

HDR (High Dynamic Range)

Onkyo TX-SR383 supports HDR (high dynamic range) video formats such as HDR10 and Dolby Vision. 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.

• HDR10: HDR10 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 10-bit color which corresponds to 1024 shades of the primary RGB colors. It is technically limited to a maximum of 10,000 nits peak brightness, however common HDR10 contents are mastered with peak brightness from 1,000 to 4,000 nits.
• Dolby Vision: Dolby Vision is a set of technologies developed by Dolby Laboratories for high dynamic range (HDR) video. It covers content creation, distribution, and playback. Like HDR10+, it includes dynamic metadata that are used to adjust and optimize each frame of the HDR video to the consumer display's capabilities in a way specified by the content creator. Dolby Vision allows for a maximum resolution of 8K up to 12-bit color depth, maximum peak brightness of 10,000 nits and a color gamut up to Rec. 2020. It uses Dolby's proprietary dynamic metadata defined in SMPTE ST 2094-10.

Onkyo TX-SR383 offers multi-zone playback which allows you to play different input sources in 2 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.

Audio

• Analog Line Inputs: There are 3 line inputs for analog audio connection.
• Digital Inputs and Outputs: 0 optical input, 1 optical output and 1 coaxial input 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: 2   Outputs: 1

Here we list all the available features and specifications of Onkyo TX-SR383.

BASICS
Brand	Onkyo
Model	TX-SR383
Type	A/V Receiver
Country	North America
Release Year	2018

AMPLIFIER
Channels	7.2
Front Wide Channel Support
Dynamic Audio Amplification
Non-Phase Shift Amplifier
VLSC (Vector Linear Shaping Circuitry)
Optimum Gain Volume Circuitry
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
DAC Specs	192 kHz/24 Bit
Maximum Channel Processing	7.1
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
Music Playback via USB	WMA, MP3, AAC
High Resolution Music Playback via USB and/or Network
DSD via HDMI	2-ch
DSD via USB
DSD to PCM Converter
USB DAC
Jitter Reduction
DTS Dialog Control
Dialog Enhancement
Dialog Normalization
Dialogue Lift
Tone Control	Front L/R Channels
Compressed Music Enhancer	Advanced Music Optimizer
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
Direct Mode
Pure Audio Mode
Pure Direct Analog Path Mode
Virtual Speakers

CALIBRATION
Auto Speaker Calibration System with Mic.	AccuEQ

VIDEO
Enhanced ARC
HDCP Version	2.2
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 Passthrough	up to 4K/60p (4:4:4)
Video Signal Upscaling
Analog To HDMI Upconversion
isf Certified Calibration Control

CONNECTIVITY
MHL Input
DLNA 1.5
FireConnect
FlareConnect
Chromecast Built-In
DTS Play-Fi
Works with Amazon Alexa
Works with SONOS
AirPlay
Apple Product Connection
Remote App
InstaPrevue Input Source Prevue
Ethernet
Ethernet Switch
Wi-Fi
Bluetooth	SBC, AAC
HDBaseT Compatible
HDMI Inputs	4
HDMI Outputs	1
8K Inputs
USB Input	1 (Front)
USB DC Out Port
RCA Line Input	3
RCA Line Output
XLR Line Inputs
Phono Input
Optical Inputs	1
Optical Outputs
Coaxial Inputs	1
Composite Video Input	2
Composite Video Output	1
S-Video Input
S-Video Output
Component Video Input
Component Video Output
PC In
Multi-Channel Input
RCA Pre-Outs	0.2
XLR Pre-outs
Front A/V Inputs	USB
Speaker A/B
Headphone Out	6.3 mm (1/4")

ZONES
Zones	2
Powered Zones	2
Zone 2 Outs
Whole House Mode
RS-232C Interface
+12V Trigger Output	0
Remote (IR) Input/Output	0 / 0

MISC
On-Screen Display	via HDMI
Detachable Power Cord
uport
ONKYO-RI System Control
RIHD (Remote Interactive Over HDMI)

RADIO
Analog Tuner	FM/AM
Presets	30
Digital Radio
Internet Radio
Pandora
Spotify
Tidal
Deezer
Napster
SiriusXM Internet Radio

CONSTRUCTION
Solid Aluminum Front
Speaker Terminals	7
Large Speaker Terminals	2
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 Supply	AC 120 V, 60 Hz
Independent Power Supply
H.C.P.S. (High Current Power Supply)
Toroidal Transformer
Power Consumption	270 W
Standby Power	0.2 W

GENERAL
Dimensions (W x H x D)	435 mm x 168 mm x 326.5 mm 17" x 6-1/2" x 13"
Weight	8.2 kg (18.1 lb 10 oz)
Warranty	2 Years

SPECS
Power Output (8 Ω, 20 Hz - 20 kHz, 2	80 W (0.08% THD)
Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA)	155 W (10% THD)
THD	0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)
Input Sensitivity and Impedance (Line)	200 mV/47 kΩ
S/N Ratio (Line, IHF-A)	106 dB
Frequency Response (Analog In)	5 Hz - 100 kHz/0 dB, -3 dB (Direct)
DSD Sampling Rates via HDMI	2.8 MHz
Video Input Sensitivity/Output Level and Impedance	1 Vp-p/75 Ω (Composite)
Bluetooth Version	3.0
Bluetooth Frequency	2.4 GHz
USB Terminal	Ver. 2.0, 5 V, 1 A
FM Frequency	87.5 MHz - 107.9 MHz
AM Frequency	530 kHz - 1710 kHz

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

In 2019 Onkyo TX-SR383 was replaced by TX-SR393. Let us now have a look at some important changes that the successor brought.

UPGRADES	Onkyo TX-SR393	vs	Onkyo TX-SR383
Certified 4 Ω Performance		vs
Higher DAC Specs	384 kHz/32 Bit	vs	192 kHz/24 Bit
Dolby Atmos Height Virtualization		vs
DTS Virtual:X		vs
DTS Dialog Control		vs
Dialog Normalization		vs
Virtual Speakers	T-D (Theater-Dimensional)	vs
HLG		vs
Video Signal Upscaling	1080p to 4K	vs
USB DC Out Port		vs
Zone 2 Outs	Zone B Line Out	vs
More Presets	40	vs	30
Bigger Power Supply	445 W	vs	270 W
Higher S/N Ratio (Line, IHF-A)	109 db	vs	106 dB
Newer Bluetooth Version	4․2	vs	3.0

DOWNGRADES	Onkyo TX-SR393	vs	Onkyo TX-SR383
Less Channels	5.2	vs	7.2
Less Channel Processing	5.1	vs	7.1
Music Playback via USB		vs	WMA, MP3, AAC
DSD via HDMI	2-ch	vs	2-ch
USB Input		vs	1 (Front)
Less Composite Video Inputs		vs	2
Less Composite Video Outputs		vs	1
Front A/V Inputs		vs	USB
Less Powered Zones		vs	2
More Speaker Terminals	5	vs	7
Higher THD	0.08% (20 Hz - 20 kHz, Half power)	vs	0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)

For more detailed comparison between the models please visit Onkyo TX-SR383 vs Onkyo TX-SR393.