Onkyo TX-SR383 vs Pioneer VSX-LX503

      Onkyo TX-SR383

      Pioneer VSX-LX503
      76
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      90
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      North America
      Taiwan Australia
      North America Europe
      Australia and Asia
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      Highlights

      • 7.2 Channels
      • 7.1 Channel Processing
      • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • Dolby Atmos, DTS:X
      • HDR10, Dolby Vision
      • 4K/60Hz Passthrough
      • Bluetooth

      Highlights

      • 9.2 Channels
      • 11.1 Channel Processing
      • 120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • Dolby Atmos, DTS:X
      • HDR10, Dolby Vision
      • 4K/60Hz Passthrough, 4K/30Hz Upscaling
      • Wi-Fi, Bluetooth, Ethernet
      • Phono Input

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

      Table of Contents
      1. Overview
      2. Pros and Cons
      3. Advantage of Onkyo TX-SR383
      4. Advantage of Pioneer VSX-LX503
      5. Common Strengths and Weaknesses
      6. Amplifier
      7. Speaker Configurations
      8. Immersive Audio Formats
      9. HDMI
      10. Inputs and Outputs
      11. Evaluations
      12. Specifications

      1. Overview

      Here we are comparing Onkyo TX-SR383 to Pioneer VSX-LX503 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-SR383 has 7 channel and the Pioneer VSX-LX503 has 9 channel amplifiers.


      Onkyo TX-SR383 Pioneer VSX-LX503

      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.

      Pioneer VSX-LX503 was introduced in 2018. It is equipped with 9 channel amplifier with 120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) power per channel and is capable of 11.1 maximum channel processing. It supports Dolby Atmos and DTS:X, passes 4K/60Hz and upscales 1080p to 4K video signal.

      We evaluated Onkyo TX-SR383 and Pioneer VSX-LX503 and gave them scores of 76 and 90 out of 100 recpectively. Our ranking system is based on the amplifier specifications, audio and video features, connectivity, multizone capabilities, radio and many other details.

      Onkyo TX-SR383

      Pioneer VSX-LX503

      Amplifier
      71
      Amplifier
      89
      Audio Features
      83
      Audio Features
      89
      Video Features
      90
      Video Features
      95
      Connectivity
      62
      Connectivity
      87
      Zones
      77
      Zones
      92
      Radio
      59
      Radio
      90
      OVERALL
      76
      OVERALL
      90

      For more details about the ranking please go to    Evaluations section.

      2. Pros and Cons

      In this section we present pros and cons of Onkyo TX-SR383 and Pioneer VSX-LX503.

      PROS

      Onkyo TX-SR383

      Pioneer VSX-LX503

      •   Dolby Atmos
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Bluetooth
      •   USB Input
      •   Composite Video Inputs
      •   Analog Tuner
      •   High Power Output - 120 W
      •   11.1 Channel Processing
      •   Dolby Atmos
      •   DTS:X
      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   Dolby Vision
      •   New HDCP Version
      •   Analog To HDMI Upconversion
      •   Wi-Fi
      •   Bluetooth
      •   Chromecast Built-In
      •   7 HDMI Inputs
      •   USB Input
      •   Phono Input
      •   RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   3 Zones
      •   Analog Tuner
      •   Spotify
      •   Tidal

      CONS

      Onkyo TX-SR383

      Pioneer VSX-LX503

      •   Low Power Output - 80 W
      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No eARC
      •   No 8K Passthrough
      •   No Wi-Fi
      •   Does not Work with Amazon Alexa
      •   4 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   Few RCA Line Inputs
      •   No Phono Input
      •   No RCA Pre-Outs
      •   No Ethernet
      •   No Digital Radio
      •   No Pandora
      •   No Spotify
      •   No Tidal
      •   Bluetooth 3.0
      •   No Front Wide Channel Support
      •   No Dolby Atmos Height Virtualization
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No eARC
      •   No 8K Passthrough
      •   Does not Work with Amazon Alexa
      •   0 8K Input
      •   No Digital Radio
      •   No Pandora


      And here are some specifications which fall into average criteria and are neither in PROs nor in CONs category:

      AVERAGE

      Onkyo TX-SR383

      Pioneer VSX-LX503

      •   7.2 Channels
      •   7.1 Channel Processing
      •   2 Zones
      •   9.2 Channels
      •   3 HDMI Outputs
      •   RCA Line Inputs
      •   Bluetooth 4․1 + LE

      3. Advantage of Onkyo TX-SR383

      This section shows those features and specifications which are the reason to choose Onkyo TX-SR383 over Pioneer VSX-LX503.

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      Onkyo TX-SR383
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      Onkyo TX-SR383 vs Pioneer VSX-LX503
      More Composite Video Outputs 1 vs

      4. Advantage of Pioneer VSX-LX503

      This section shows those features and specifications which are the reason to choose Pioneer VSX-LX503 over Onkyo TX-SR383.

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      Pioneer VSX-LX503
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      Onkyo TX-SR383 vs Pioneer VSX-LX503
      More Channels 7.2 vs 9.2
      Higher Power Output 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) vs 120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Certified 4 Ω Performance vs
      Bi-amp capability vs
      Higher DAC Specs 192 kHz/24 Bit vs 384 kHz/32 Bit
      More Channel Processing 7.1 vs 11.1
      Music Playback via USB WMA, MP3, AAC vs MP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD, Dolby TrueHD
      Higher Resolution Music Playback via USB vs 64, 88.2, 96, 176.4, 192 kHz/24 bit
      DSD via HDMI 2-ch vs 2-ch/Multi-ch Input
      DSD via USB vs 2-ch Input
      DTS Dialog Control vs
      Dialog Normalization vs
      More Tone Control Channels Front L/R Channels vs All Channels
      HLG vs
      Video Signal Upscaling vs 1080p to 4K
      Analog To HDMI Upconversion vs Component**, Composite
      Wi-Fi vs
      Chromecast Built-In vs
      Works with SONOS vs
      DTS Play-Fi vs
      AirPlay vs AirPlay
      Remote Controll App vs Pioneer Remote App
      More HDMI Inputs 4 vs 7 (1 front)
      More HDMI Outputs 1 vs 2 (1 MAIN, 1 SUB/ZONE 2)
      USB Input 1 (Front) vs 2 (1 Front)
      More Optical Inputs 1 vs 2
      More RCA Line Inputs 3 vs 4
      Phono Input vs
      More RCA Pre-Outs 0.2 vs 11.2
      More Component Video Inputs vs 1
      Ethernet vs
      Front A/V Inputs USB vs HDMI, USB
      Speaker A/B vs
      Detachable Power Cord vs
      More Zones 2 vs 3
      More Powered Zones 2 vs 2 and 3
      Zone 2 Outs vs HDMI, RCA Pre/Line Out
      RS-232C Interface vs
      +12V Trigger Output 0 vs 2 (A: 100 mA, B: 25 mA)
      Remote (IR) Input/Output 0 / 0 vs 1 / 1
      Analog Tuner FM/AM vs FM/AM with RDS
      More Presets 30 vs 40
      Internet Radio vs TuneIn
      Spotify vs
      Tidal vs
      Deezer vs
      More Speaker Terminals 7 vs 11
      More Large Speaker Terminals 2 vs 11
      Bigger Power Supply 270 W vs 870 W
      Higher Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA) 155 W (10% THD) vs 215 W (10% THD)
      Higher DSD Sampling Rate via HDMI 2.8 MHz vs 2.8 MHz (2-ch/multi-ch), 5.6 MHz (2-ch)
      Newer Bluetooth Version 3.0 vs 4․1 + LE
      Wider AM Frequency Range 530 kHz - 1710 kHz vs 522/530 kHz - 1611/1710 kHz
      Longer Warranty 2 Years vs 3 Years

      5. Common Strengths and Weaknesses

      We already listed pros and cons of each model. However, you may also find useful to look at their common strengths and weaknesses shown side-by-side.

      STRENGTHS Onkyo TX-SR383 Pioneer VSX-LX503
        Dolby Atmos
        DTS:X
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ MCACC
        HDR10
        Dolby Vision
        New HDCP Version2.22.2
        Bluetooth SBC, AAC SBC, AAC
        USB Input1 (Front)2 (1 Front)
        Composite Video Inputs22
        Analog Tuner FM/AM FM/AM with RDS
      WEAKNESSES Onkyo TX-SR383 Pioneer VSX-LX503
        No Front Wide Channel Support
        No Dolby Atmos Height Virtualization
        No IMAX Enhanced
        No Auro 3D with Auro-Matic Upmixer
        No HDR10+
        No eARC
        No 8K Passthroughup to 4K/60p (4:4:4)up to 4K/60p (YCbCr 4:4:4)
        Does not Work with Amazon Alexa
        Few 8K Inputs
        No Digital Radio
        No Pandora

      6. Amplifier

      Onkyo TX-SR383 Pioneer VSX-LX503

      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).

      9 channel Direct Energy Amplifier: Pioneer VSX-LX503 features 9 channel power amplifier with Direct Energy design. It is rated at 120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven) and is able to drive 4 ohm speakers.


        AMPLIFIER Onkyo TX-SR383 Pioneer VSX-LX503
        Channels7.29.2
        Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        Front Wide Channel Support
        THX™ Certification
        Continuous 6 Ω Rated
        Certified 4 Ω Performance
        Bi-amp Capability

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        Onkyo TX-SR383
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        7. Speaker Configurations

        Onkyo TX-SR383's and Pioneer VSX-LX503's amplifiers can be assigned for different speaker configurations.

        • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
        • Onkyo TX-SR383: 5.2.2 with internal amplifier.
        • Pioneer VSX-LX503: 5.2.2, 5.2.4, 7.2.2 with internal amplifier and 7.2.4 with addition of external 2 channel amplifier.
        • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
        • Onkyo TX-SR383: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2 with internal amplifier.
        • Pioneer VSX-LX503: The speaker configurations for DTS:X are the same as for Dolby Atmos - 5.2.2, 5.2.4, 7.2.2 with internal amplifier and 7.2.4 with addition of external 2 channel amplifier.
        • Configurations without height channels: There are also other speaker configurations available which do not include height channels:
        • Onkyo TX-SR383: 5.2, 7.2 with internal amplifier.
        • Pioneer VSX-LX503: 5.2, 7.2 with internal amplifier.
        • Bi-Amp: Pioneer VSX-LX503 is able 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.

        8. Immersive Audio Formats

        Dolby Atmos

        Onkyo TX-SR383 and Pioneer VSX-LX503 support Dolby Atmos.

        • Dolby Surround Upmixer: Both models support 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 and Pioneer VSX-LX503 support DTS:X.

        • DTS Neural:X: Both models feature DTS Neural:X which 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.
        • DTS Dialog Control: Onkyo TX-SR383 supports DTS Dialog Control. This function adjusts the dialog levels during playback of the DTS:X stream. It allows you to separately increase the dialog levels in contrast with the background sound and hear dialog easily even under noisy circumstances.
        AUDIO DECODING Onkyo TX-SR383 Pioneer VSX-LX503
        Dolby Atmos
        Dolby Atmos Height Virtualization
        Dolby Atmos Music
        Dolby TrueHD
        Dolby Digital Plus
        Dolby Surround Upmixer
        Dolby Pro Logic
        Dolby Digital EX
        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 Discrete 6.1, Matrix 6.1
        IMAX Enhanced
        Auro 3D with Auro-Matic Upmixer

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        Pioneer VSX-LX503
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        9. HDMI

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

        Pioneer VSX-LX503 comes with 7 HDMI inputs. It has 2 outputs - 1 MAIN and 1 SUB/ZONE 2.

        • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K/60p (4:4:4) video signal.
        • 4K Upscaling on Pioneer VSX-LX503: It can upscale 1080p to 4K from HDMI and analog sources.
        • Analog To HDMI Upconversion: Pioneer VSX-LX503 supports analog to HDMI Upconversion, so you can input your analog video sources and output them digitally via HDMI. This means that you will need only one HDMI cable to connect to your TV.
        • 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% (available on both models).
        • HDCP 2.2 Copy Protection: Both receivers are HDCP 2.2 compliant which is a requirement for 4K/HDR copy-protected content transmission.
        • 3D Ready: Both receivers are able to pass 3D video through HDMI.

        HDR (High Dynamic Range)

        Onkyo TX-SR383 supports HDR10 and Dolby Vision.

        Pioneer VSX-LX503 supports HDR10, Dolby Vision and Hybrid Log-Gamma. 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.



        VIDEO FEATURES Onkyo TX-SR383 Pioneer VSX-LX503
        HDR10
        HDR10+
        Dynamic HDR
        BT.2020 color space
        Dolby Vision
        HLG (Hybrid Log Gamma)
        HDBaseT Compatible
        Enhanced Audio Return Channel (eARC)
        HDCP Version2.22.2
        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 (4:4:4)up to 4K/60p (YCbCr 4:4:4)
        Video Signal Upscaling 1080p to 4K

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        Onkyo TX-SR383
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        10. Inputs and Outputs

        Audio

        • Phono Input: There is an MM phono input on Pioneer VSX-LX503 with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
        • Analog Pre-Outs: Pioneer VSX-LX503 has 11.2 preamplifier outputs which allows you to connect the 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 receiver to power the rest. Also, Pioneer VSX-LX503 has 11 channel processing but has only 7 channel amplifier, so it needs external amplifier connected to the analog pre-outs in order to reach its maximum speaker configuration.
        • Analog Line Inputs: There are 3 pair of line inputs on Onkyo TX-SR383 and 4 pair of line inputs on Pioneer VSX-LX503 for connecting sources with analog outputs.
        • Digital Inputs: 1 optical input and 1 coaxial input are available on Onkyo TX-SR383 and 2 optical inputs and 1 coaxial input are available on Pioneer VSX-LX503 for digital audio connections.
        • Headphone Output: There is a 6.3 mm (1/4") headphone output jack on the front panel of each receiver.

        Video

        • HDMI:
        • Onkyo TX-SR383
          Inputs:           4   Outputs: 1
          8K Inputs: 0.
        • Pioneer VSX-LX503
          Inputs:           7 (1 front)   Outputs: 2 (1 MAIN, 1 SUB/ZONE 2)
          8K Inputs: 0.
        • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
        • Onkyo TX-SR383
          Inputs:           2   Outputs: 1.
        • Pioneer VSX-LX503
          Inputs:           2   Outputs: 0.
        • 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. resolution on Component video connectors.
        • Pioneer VSX-LX503 supports up to 480i/576i resolution on Component video connectors.
        • Onkyo TX-SR383
          Inputs:           0   Outputs: 0.
        • Pioneer VSX-LX503
          Inputs:           1   Outputs: 0.

        Front A/V Inputs

        • Onkyo TX-SR383: USB
        • Pioneer VSX-LX503: HDMI, USB

        Onkyo TX-SR383

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        Pioneer VSX-LX503

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        TERMINALS Onkyo TX-SR383 Pioneer VSX-LX503
        HDMI Inputs47 (1 front)
        HDMI Outputs12 (1 MAIN, 1 SUB/ZONE 2)
        8K Inputs
        USB Input1 (Front)2 (1 Front)
        USB DC Out Port
        Optical Inputs12
        Optical Outputs
        Coaxial Inputs11
        RCA Line Inputs34
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.211.2
        XLR Pre-outs
        Composite Video Inputs22
        Composite Video Outputs1
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs1
        Component Video Outputs

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        Pioneer VSX-LX503
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        11. Evaluations

        We evaluated Onkyo TX-SR383 and Pioneer VSX-LX503 and gave them scores of 76 and 90 out of 100 recpectively. We also gave separate scores for 7 different categories according to the available features and specifications some of which are listed below. These evaluations are relative and may change each time a new receiver is added to the database.


        Onkyo TX-SR383

        Pioneer VSX-LX503

        OVERALL
        76
        OVERALL
        90

        Amplifier

        GOOD
        71
        •   7.2 Channels
        •   Low Power Output - 80 W
        EXCELLENT
        89
        •   9.2 Channels
        •   High Power Output - 120 W

        Audio Features

        GOOD
        83
        •   7.2 Channels
        •   No Front Wide Channel Support
        •   7.1 Channel Processing
        •   Dolby Atmos
        •   No Dolby Atmos Height Virtualization
        •   DTS:X
        •   No IMAX Enhanced
        •   No Auro 3D with Auro-Matic Upmixer
        •   DSD via HDMI
        EXCELLENT
        89
        •   9.2 Channels
        •   No Front Wide Channel Support
        •   11.1 Channel Processing
        •   Dolby Atmos
        •   No Dolby Atmos Height Virtualization
        •   DTS:X
        •   No IMAX Enhanced
        •   No Auro 3D with Auro-Matic Upmixer
        •   DSD via HDMI

        Video Features

        EXCELLENT
        90
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   No 8K Passthrough
        EXCELLENT
        95
        •   HDR10
        •   No HDR10+
        •   Dolby Vision
        •   No 8K Passthrough
        •   Analog To HDMI Upconversion

        Connectivity

        AVERAGE
        62
        •   No eARC
        •   New HDCP Version
        •   No Wi-Fi
        •   Bluetooth
        •   Does not Work with Amazon Alexa
        •   4 HDMI Inputs
        •   1 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   Few RCA Line Inputs
        •   No Phono Input
        •   No RCA Pre-Outs
        •   Composite Video Inputs
        •   No Ethernet
        •   Bluetooth 3.0
        EXCELLENT
        87
        •   No eARC
        •   New HDCP Version
        •   Wi-Fi
        •   Bluetooth
        •   Does not Work with Amazon Alexa
        •   Chromecast Built-In
        •   7 HDMI Inputs
        •   3 HDMI Outputs
        •   0 8K Input
        •   USB Input
        •   RCA Line Inputs
        •   Phono Input
        •   RCA Pre-Outs
        •   Composite Video Inputs
        •   Component Video Inputs
        •   Ethernet
        •   Bluetooth 4․1 + LE

        Zones

        GOOD
        77
        •   2 Zones
        EXCELLENT
        92
        •   3 Zones

        Radio

        AVERAGE
        59
        •   Analog Tuner
        •   No Pandora
        •   No Spotify
        •   No Tidal
        EXCELLENT
        90
        •   Analog Tuner
        •   No Pandora
        •   Spotify
        •   Tidal

        12. Specifications

        GENERAL Onkyo TX-SR383 Pioneer VSX-LX503
        BrandOnkyoPioneer
        SeriesElite
        ModelTX-SR383VSX-LX503
        TypeA/V ReceiverA/V Receiver
        CountryNorth AmericaAustralia and Asia
        Release Year20182018
        PredecessorOnkyo TX-SR373 Pioneer SC-LX502
        SuccessorOnkyo TX-SR393 Pioneer VSX-LX504
        AMPLIFIER Onkyo TX-SR383 Pioneer VSX-LX503
        Channels7.29.2
        Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        Front Wide Channel Support
        Amplifier DesignDirect Energy
        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 FEATURES Onkyo TX-SR383 Pioneer VSX-LX503
        Digital Signal Processing (DSP) EngineDigital Quad-Core 32-bit DSP (Cirrus Logic) + Aureus™ Floating-Point DSP (TI)
        DACAKM AK4458 & TI PCM5101
        DAC Specs192 kHz/24 Bit384 kHz/32 Bit
        Maximum Channel Processing7.111.1
        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
        Surround EX
        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 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 USBWMA, MP3, AACMP3, WMA, AAC, Apple Lossless, WAV, FLAC, AIFF, DSD, Dolby TrueHD
        High Resolution Music Playback via USB and/or Network 64, 88.2, 96, 176.4, 192 kHz/24 bit
        High Resolution Audio Formats via USBApple Lossless, WAV, FLAC, AIFF, AAC, DSD, Dolby TrueHD
        Gapless Playback
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        DSD via USB 2-ch Input
        DSD to PCM Converter
        USB DAC
        Jitter Reduction
        DTS Dialogue Control
        Dialog Enhancement
        Dialog normalization
        Dialogue Lift
        Sound Retriever Advanced
        Sound Retriever AIR
        Digital noise Reduction
        Tone Control Front L/R Channels All Channels
        Compressed Music Enhancer Advanced Music Optimizer Advanced Sound Retriever
        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
        Pure Direct Mode
        Auto Surround
        Optimum Surround
        Advanced SurroundMultiple
        Wide Surround
        Front Stage Surround Advance
        Headphone Surround
        Virtual Speakers
        Virtual Depth
        CALIBRATION Onkyo TX-SR383 Pioneer VSX-LX503
        Auto Speaker Calibration System with Mic. AccuEQ MCACC
        Manual MCACC
        MCACC Memory1
        Reflex Optimizer
        Phase Control
        Auto Phase Control Plus
        Full Band Phase Control
        Standing Wave Control
        Symmetric EQ
        Precision Distance
        Polarity Check
        Auto Subwoofer Crossover
        VIDEO FEATURES Onkyo TX-SR383 Pioneer VSX-LX503
        HDR10
        HDR10+
        Dynamic HDR
        BT.2020 color space
        Dolby Vision
        HLG (Hybrid Log Gamma)
        HDBaseT Compatible
        Enhanced Audio Return Channel (eARC)
        HDCP Version2.22.2
        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 (4:4:4)up to 4K/60p (YCbCr 4:4:4)
        Video Signal Upscaling 1080p to 4K
        Analog To HDMI Upconversion Component**, Composite
        Component Video Upscaling
        Analog to Analog Video conversion
        Component Video Maximum Resolution480i/576i
        Stream Smoother
        Pure Cinema
        Video Parameter Adjustments
        Super Resolution
        isf Certified Calibration Control
        CONNECTIVITY Onkyo TX-SR383 Pioneer VSX-LX503
        Wi-Fi
        Bluetooth SBC, AAC SBC, AAC
        Works with Amazon Alexa
        Chromecast Built-In
        Works with SonoS
        DTS Play-Fi
        MHL Input
        DLNA 1.5
        AirPlay AirPlay
        Apple Product Connection Made for iPhone, iPod and iPad (Airplay only)
        Remote App Pioneer Remote App
        InstaPrevue Input Source Prevue
        TERMINALS Onkyo TX-SR383 Pioneer VSX-LX503
        HDMI Inputs47 (1 front)
        HDMI Outputs12 (1 MAIN, 1 SUB/ZONE 2)
        8K Inputs
        USB Input1 (Front)2 (1 Front)
        USB DC Out Port
        Optical Inputs12
        Optical Outputs
        Coaxial Inputs11
        RCA Line Inputs34
        RCA Line Outputs
        XLR Line Inputs
        Phono Input
        Multi-Channel Input
        RCA Pre-Outs0.211.2
        XLR Pre-outs
        Composite Video Inputs22
        Composite Video Outputs1
        S-Video Inputs
        S-Video Outputs
        Component Video Inputs1
        Component Video Outputs
        Ethernet
        Ethernet Switch
        PC In
        Front A/V InputsUSBHDMI, USB
        Speaker A/B
        Headphone Out6.3 mm (1/4")6.3 mm (1/4")
        Detachable Power Cord
        uport
        adapterport
        ZONES Onkyo TX-SR383 Pioneer VSX-LX503
        Number of Zones23
        Powered Zones 22 and 3
        Zone 2 OutsHDMI, RCA Pre/Line Out
        Zone 3 OutsRCA Pre/Line Out
        Whole House Mode
        RS-232C Interface
        +12V Trigger Output02 (A: 100 mA, B: 25 mA)
        Remote (IR) Input/Output0 / 01 / 1
        MISCELLANEOUS Onkyo TX-SR383 Pioneer VSX-LX503
        On-Screen Display via HDMI
        GUI Languages9
        AV Navigator
        IP Control
        PreAmp Mode
        Versatile Speaker ConfigurationFRONT, CENTER, SURROUND, HEIGHT 1/Bi-AMP/ZONE 2, SURROUND BACK/HEIGHT 2/ZONE 3
        FL Dimmer
        Function Rename
        Remote Controller User-Friendly Simple Remote Control
        ONKYO-RI System Control
        RIHD (Remote Interactive Over HDMI)
        RADIO Onkyo TX-SR383 Pioneer VSX-LX503
        Analog Tuner FM/AM FM/AM with RDS
        Presets3040
        Digital Radio
        Internet Radio TuneIn
        Pandora
        Spotify
        Tidal
        Deezer
        Napster
        SiriusXM
        CONSTRUCTION Onkyo TX-SR383 Pioneer VSX-LX503
        Front PanelBrushed
        Solid Aluminum Front
        Speaker Terminals711
        Large Speaker Terminals211
        Color-Coded Speaker Terminals
        Transparent High-Grade Speaker Terminals
        3D Space Frame Construction
        Gold plated RCA terminals
        POWER Onkyo TX-SR383 Pioneer VSX-LX503
        Power SupplyAC 120 V, 60 HzAC 220-240 V, 50/60 Hz
        Independent Power Supply
        H.C.P.S. (High Current Power Supply)
        Toroidal Transformer
        Low Leakage Flux Power Transformer
        Transformer Stabilizer
        Power Consumption270 W870 W
        No Sound Power70 W
        Standby Power0.2 W0.15 W
        PHYSICAL Onkyo TX-SR383 Pioneer VSX-LX503
        Dimensions (W x H x D)435 mm x 168 mm x 326.5 mm
        17" x 6-1/2" x 13"        		435 mm x 185 mm x 386 mm
        17-1/8" x 7-5/16" x 15-3/16"
        Weight8.2 kg (18.1 lb 10 oz)13.0 kg (28.7 lbs)
        SPECIFICATIONS Onkyo TX-SR383 Pioneer VSX-LX503
        Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)80 W (0.08% THD)
        Maximum Effective Power Output (6 Ω, 1 kHz, 1 channel driven, JEITA or IEC)155 W (10% THD)215 W (10% THD)
        Rated Power Output (6 Ω, 1 kHz, 1 channel driven, IEC)180 W (1% THD)
        Dynamic Power per Channel (3 Ω, Front)250 W
        Dynamic Power per Channel (4 Ω, Front)220 W
        Dynamic Power per Channel (8 Ω, Front)130 W
        THD0.06% (20 Hz - 20 kHz, 1 Channel Driven, 50 W)0.08% (20 Hz - 20 kHz, half power)
        Input Sensitivity and Impedance (Line)200 mV/47 kΩ200 mV/47 kΩ
        Input Sensitivity and Impedance (Phono MM)3.5 mV/47 kΩ
        Rated Preout Level and Impedance1 V/470 Ω
        Rated Headphone Jack Output Level and Impedance8 Ω - 600 Ω
        Rated Headphone Power Output85 mW (32 Ω, 1 kHz, 10% THD)
        Phono Overload70 mV (MM, 1 kHz 0.5%)
        S/N Ratio (Line, IHF-A)106 dB106 dB
        S/N Ratio (Phono MM, IHF-A)80 dB
        Frequency Response (Analog In)5 Hz - 100 kHz/0 dB, -3 dB (Direct)5 Hz - 100 kHz/+1 dB, -3 dB (Direct/Pure Audio)
        DSD Sampling Rates via HDMI2.8 MHz2.8 MHz (2-ch/multi-ch), 5.6 MHz (2-ch)
        DSD Sampling Rates via USB2.8 MHz, 5.6 MHz, 11.2 MHz
        Video Input Sensitivity/Output Level and Impedance 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-TX
        Wi-Fi StandardIEEE 802.11 a/b/g/n
        Wi-Fi Terminal Frequency5 GHz, 2.4 GHz
        Bluetooth Version3.04․1 + LE
        Bluetooth Frequency2.4 GHz2.4 GHz
        USB TerminalVer. 2.0, 5 V, 1 AVer. 2.0, 5 V, 500 mA
        FM Frequency87.5 MHz - 107.9 MHz87.5 MHz - 108.0 MHz
        FM 50 dB Quiet Sensitivity (IHF, 1 kHz, 100% MOD.)Mono: 1.56 µV (15.0 dBf)
        AM Frequency530 kHz - 1710 kHz522/530 kHz - 1611/1710 kHz
        Warranty2 Years3 Years

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

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