Onkyo TX-SR353 vs Onkyo TX-NR555

      Onkyo TX-SR353

      Onkyo TX-NR555
      68
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      83
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      North America
      North America
      Europe Australia Asia
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      Highlights

      • 5.1 Channels
      • 5.1 Channel Processing
      • 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      • HDR10
      • 4K/60Hz Passthrough
      • Bluetooth

      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, 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-SR353
      4. Advantage of Onkyo TX-NR555
      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-SR353 to Onkyo TX-NR555 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-SR353 has 5 channel and the Onkyo TX-NR555 has 7 channel and equally powerful amplifiers.


      Onkyo TX-SR353 Onkyo TX-NR555

      Onkyo TX-SR353 was introduced in 2016. It is equipped with 5 channel amplifier with 80 W (8 Ω, 20 Hz - 20 kHz and 2 channel driven) power per channel and is capable of 5.1 maximum channel processing. It , passes 4K/60Hz video signal.

      Onkyo TX-NR555 was introduced in 2016. 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 and upscales 1080p to 4K video signal.

      We evaluated Onkyo TX-SR353 and Onkyo TX-NR555 and gave them scores of 68 and 83 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-SR353

      Onkyo TX-NR555

      Amplifier
      70
      Amplifier
      75
      Audio Features
      62
      Audio Features
      86
      Video Features
      84
      Video Features
      92
      Connectivity
      62
      Connectivity
      81
      Zones
      55
      Zones
      77
      Radio
      59
      Radio
      92
      OVERALL
      68
      OVERALL
      83

      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-SR353 and Onkyo TX-NR555.

      PROS

      Onkyo TX-SR353

      Onkyo TX-NR555

      •   DSD via HDMI
      •   Auto Speaker Calibration System with Mic.
      •   HDR10
      •   New HDCP Version
      •   Bluetooth
      •   USB Input
      •   Composite Video Inputs
      •   Analog Tuner
      •   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
      •   USB Input
      •   Many RCA Line Inputs
      •   Phono Input
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Tidal

      CONS

      Onkyo TX-SR353

      Onkyo TX-NR555

      •   Few Channels - 5.1
      •   Low Power Output - 80 W
      •   5.1 Channel Processing
      •   No Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   No HDR10+
      •   No Dolby Vision
      •   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 Zones
      •   No Digital Radio
      •   No Pandora
      •   No Spotify
      •   No Tidal
      •   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
      •   Does not Work with Amazon Alexa
      •   1 HDMI Outputs
      •   0 8K Input
      •   No RCA Pre-Outs
      •   No Digital Radio


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

      AVERAGE

      Onkyo TX-SR353

      Onkyo TX-NR555

      •   7.2 Channels
      •   7.1 Channel Processing
      •   6 HDMI Inputs
      •   2 Zones
      •   Bluetooth 4․1 + LE

      3. Advantage of Onkyo TX-SR353

      This section shows those features and specifications which are the reason to choose Onkyo TX-SR353 over Onkyo TX-NR555.

      Check the Price

      Onkyo TX-SR353
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      Onkyo TX-SR353 vs Onkyo TX-NR555
      More Composite Video Outputs 1 vs
      Front A/V Inputs USB vs Mini-Jack
      Lower THD 0.06% (20 Hz - 20 kHz, 8 Ω, 1 Channel Driven, 50 W) vs 0.08% (20 Hz - 20 kHz, Half power)

      4. Advantage of Onkyo TX-NR555

      This section shows those features and specifications which are the reason to choose Onkyo TX-NR555 over Onkyo TX-SR353.

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      Onkyo TX-NR555
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      Onkyo TX-SR353 vs Onkyo TX-NR555
      More Channels 5.1 vs 7.2
      Dynamic Audio Amplification vs
      Non-Phase Shift Amplifier vs
      VLSC (Vector Linear Shaping Circuitry) vs Front L/R channels
      Optimum Gain Volume Circuitry vs
      Bi-amp capability vs
      Higher DAC Specs 192 kHz/24 Bit vs 384 kHz/32 Bit
      More Channel Processing 5.1 vs 7.1
      Dolby Atmos vs up to 5.1.2
      Dolby Surround Upmixer vs
      DTS:X vs up to 5.1.2
      DTS Neural:X vs after firmware update
      Higher Resolution Music Playback via USB vs up to 192 kHz
      DSD via HDMI 2-ch vs 2-ch/Multi-ch Input
      Jitter Reduction vs PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
      DTS Dialog Control vs
      Dialog Normalization vs
      Phase-Matching Bass Boost vs
      Dolby Vision vs
      Video Signal Upscaling vs 1080p to 4K
      Analog To HDMI Upconversion vs Component**, Composite
      Wi-Fi vs
      Chromecast Built-In vs
      AirPlay vs AirPlay
      Remote Controll App vs Onkyo Remote App for iPod touch/iPhone and Android-Powered Devices
      More HDMI Inputs 4 vs 6
      More Optical Inputs 1 vs 2
      More RCA Line Inputs 3 vs 7 (1 Front)
      Phono Input vs
      More Component Video Inputs vs 2
      Ethernet vs
      More Zones 1 vs 2
      RIHD (Remote Interactive Over HDMI) vs
      More Presets 30 vs 40
      Internet Radio vs TuneIn
      Pandora vs
      Spotify vs
      Tidal vs
      Deezer vs
      More Speaker Terminals 5 vs 9
      More Large Speaker Terminals 2 vs 9
      H.C.P.S. (High Current Power Supply) vs Massive High Power Transformer
      Bigger Power Supply 210 W vs 460 W
      Higher S/N Ratio (Line, IHF-A) 98 dB vs 106 dB
      Wider AM Frequency Range 530 kHz - 1700 kHz vs 530 kHz - 1710 kHz

      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-SR353 Onkyo TX-NR555
        DSD via HDMI 2-ch 2-ch/Multi-ch Input
        Auto Speaker Calibration System with Mic. AccuEQ AccuEQ with AccuReflex™
        HDR10
        New HDCP Version2.22.2 (3 inputs / 1 output)
        Bluetooth SBC, AAC
        USB Input1 (Front)1 (Rear)
        Composite Video Inputs22
        Analog Tuner FM/AM FM/AM
      WEAKNESSES Onkyo TX-SR353 Onkyo TX-NR555
        Low Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
        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 (RGB/YCbCr4:4:4)
        Does not Work with Amazon Alexa
        Few HDMI Outputs11
        Few 8K Inputs
        No RCA Pre-Outs0.10.2
        No Digital Radio

      6. Amplifier

      Onkyo TX-SR353 Onkyo TX-NR555

      5 channel Amplifier: Onkyo TX-SR353 features 5 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).

      7 channel Amplifier: Onkyo TX-NR555 features 7 channel power amplifier. It is rated at 80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven).
      • Dynamic Audio Amplification: Onkyo TX-NR555 features 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.


      AMPLIFIER Onkyo TX-SR353 Onkyo TX-NR555
      Channels5.17.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Dynamic Audio Amplification
      Non-Phase Shift Amplifier
      VLSC (Vector Linear Shaping Circuitry) Front L/R channels
      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)

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      Onkyo TX-SR353
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      7. Speaker Configurations

      Onkyo TX-SR353's and Onkyo TX-NR555's amplifiers can be assigned for different speaker configurations.

      • Dolby Atmos Configurations: The following speaker configurations are supported for Dolby Atmos:
      • Onkyo TX-SR353: Not supported.
      • Onkyo TX-NR555: 5.2.2 with internal amplifier.
      • DTS:X Configurations: The following speaker configurations are supported for DTS:X:
      • Onkyo TX-SR353: Not supported.
      • Onkyo TX-NR555: 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:
      • Onkyo TX-SR353: 5.1 with internal amplifier.
      • Onkyo TX-NR555: 5.2, 7.2 with internal amplifier.
      • Bi-Amp: Onkyo TX-NR555 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-NR555 supports Dolby Atmos.

      • Dolby Surround Upmixer: Onkyo TX-NR555 supports 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-NR555 supports DTS:X.

      • DTS Neural:X: Onkyo TX-NR555 features 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-NR555 has 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-SR353 Onkyo TX-NR555
      Dolby Atmos up to 5.1.2
      Dolby Atmos Height Virtualization
      Dolby Atmos Music
      Dolby TrueHD
      Dolby Digital Plus
      Dolby Surround Upmixer
      Dolby Digital EX
      DTS:X up to 5.1.2
      DTS Neural:X after firmware update
      DTS Virtual:X
      DTS-HD Master Audio
      DTS-HD High Resolution Audio
      DTS 96/24
      IMAX Enhanced
      Auro 3D with Auro-Matic Upmixer

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      Onkyo TX-NR555
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      9. HDMI

      Onkyo TX-SR353 comes with 4 HDMI inputs. It has 1 output.

      Onkyo TX-NR555 comes with 6 HDMI inputs. It has 1 output.

      • 4K/60Hz Passthrough: On both receivers all inputs pass up to 4K/60p (4:4:4) video signal.
      • 4K Upscaling on Onkyo TX-NR555: It can upscale 1080p to 4K from HDMI and analog sources.
      • Analog To HDMI Upconversion: Onkyo TX-NR555 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-SR353 supports HDR10

      Onkyo TX-NR555 supports 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.



      VIDEO FEATURES Onkyo TX-SR353 Onkyo TX-NR555
      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 (3 inputs / 1 output)
      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 (RGB/YCbCr4:4:4)
      Video Signal Upscaling 1080p to 4K

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      Onkyo TX-SR353
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      10. Inputs and Outputs

      Audio

      • Phono Input: There is an MM phono input on Onkyo TX-NR555 with built-in phono stage for connecting the moving magnet cartridge output of the turntable directly to the receiver.
      • Analog Line Inputs: There are 3 pair of line inputs on Onkyo TX-SR353 and 7 pair of line inputs on Onkyo TX-NR555 for connecting sources with analog outputs.
      • Digital Inputs: 1 optical input and 1 coaxial input are available on Onkyo TX-SR353 and 2 optical inputs and 1 coaxial input are available on Onkyo TX-NR555 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-SR353
        Inputs:         4   Outputs: 1
        8K Inputs: 0.
      • Onkyo TX-NR555
        Inputs:         6   Outputs: 1
        8K Inputs: 0.
      • Composite Video: Connect you VCR, Laserdisc player and other old video equipment with composite video cables.
      • Onkyo TX-SR353
        Inputs:         2   Outputs: 1.
      • Onkyo TX-NR555
        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.
      • Onkyo TX-NR555 supports up to 480i/576i resolution on Component video connectors.
      • Onkyo TX-SR353
        Inputs:         0   Outputs: 0.
      • Onkyo TX-NR555
        Inputs:         2   Outputs: 0.

      Front A/V Inputs

      • Onkyo TX-SR353: USB
      • Onkyo TX-NR555: Mini-Jack

      Onkyo TX-SR353

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      Onkyo TX-NR555

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      TERMINALS Onkyo TX-SR353 Onkyo TX-NR555
      HDMI Inputs46
      HDMI Outputs11
      8K Inputs
      USB Input1 (Front)1 (Rear)
      USB DC Out Port
      Optical Inputs12
      Optical Outputs
      Coaxial Inputs11
      RCA Line Inputs37 (1 Front)
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.10.2
      XLR Pre-outs
      Composite Video Inputs22
      Composite Video Outputs1
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs2
      Component Video Outputs

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      Onkyo TX-NR555
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      11. Evaluations

      We evaluated Onkyo TX-SR353 and Onkyo TX-NR555 and gave them scores of 68 and 83 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-SR353

      Onkyo TX-NR555

      OVERALL
      68
      OVERALL
      83

      Amplifier

      GOOD
      70
      •   Few Channels - 5.1
      •   Low Power Output - 80 W
      GOOD
      75
      •   7.2 Channels
      •   Low Power Output - 80 W

      Audio Features

      AVERAGE
      62
      •   Few Channels - 5.1
      •   5.1 Channel Processing
      •   No Dolby Atmos
      •   No Dolby Atmos Height Virtualization
      •   No DTS:X
      •   No IMAX Enhanced
      •   No Auro 3D with Auro-Matic Upmixer
      •   DSD via HDMI
      EXCELLENT
      86
      •   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

      Video Features

      GOOD
      84
      •   HDR10
      •   No HDR10+
      •   No Dolby Vision
      •   No 8K Passthrough
      EXCELLENT
      92
      •   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
      GOOD
      81
      •   No eARC
      •   New HDCP Version
      •   Wi-Fi
      •   Bluetooth
      •   Does not Work with Amazon Alexa
      •   Chromecast Built-In
      •   6 HDMI Inputs
      •   1 HDMI Outputs
      •   0 8K Input
      •   USB Input
      •   Many RCA Line Inputs
      •   Phono Input
      •   No RCA Pre-Outs
      •   Composite Video Inputs
      •   Component Video Inputs
      •   Ethernet
      •   Bluetooth 4․1 + LE

      Zones

      AVERAGE
      55
      •   No Zones
      GOOD
      77
      •   2 Zones

      Radio

      AVERAGE
      59
      •   Analog Tuner
      •   No Pandora
      •   No Spotify
      •   No Tidal
      EXCELLENT
      92
      •   Analog Tuner
      •   Pandora
      •   Spotify
      •   Tidal

      12. Specifications

      GENERAL Onkyo TX-SR353 Onkyo TX-NR555
      BrandOnkyoOnkyo
      ModelTX-SR353TX-NR555
      TypeA/V ReceiverA/V Receiver
      CountryNorth AmericaNorth America
      Release Year20162016
      PredecessorOnkyo TX-SR343 Onkyo TX-NR545
      SuccessorOnkyo TX-SR373 Onkyo TX-NR575
      AMPLIFIER Onkyo TX-SR353 Onkyo TX-NR555
      Channels5.17.2
      Power Output80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)80 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
      Front Wide Channel Support
      Dynamic Audio Amplification
      Non-Phase Shift Amplifier
      VLSC (Vector Linear Shaping Circuitry) Front L/R channels
      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 Onkyo TX-SR353 Onkyo TX-NR555
      Digital Signal Processing (DSP) EngineAdvanced 32-bit DSP Chip
      DACAKM AK4458 (8 Channels x 1)
      DAC Specs192 kHz/24 Bit384 kHz/32 Bit
      Maximum Channel Processing5.17.1
      Air Studios Monitor Certification
      Dolby Atmos up to 5.1.2
      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 up to 5.1.2
      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
      IMAX Enhanced
      Auro 3D with Auro-Matic Upmixer
      PCM 2-ch/Multi-ch Input 2-ch/Multi-ch Input
      Network Audio FormatsFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, MPEG-4 AAC, LPCM
      Music Playback via USBFLAC, WAV, Apple Lossless, WMA, MP3, DSD, AIFF, AAC, Dolby TrueHD
      High Resolution Music Playback via USB and/or Network up to 192 kHz
      High Resolution Audio Formats via USBFLAC, WAV, Apple Lossless, DSD, AIFF, AAC, 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 PLL (Phase Locked Loop) Jitter-Cleaning Circuit Technology for S/PDIF Audio
      DTS Dialogue Control
      Dialog Enhancement
      Dialog normalization
      Dialogue Lift
      Tone Control Front L/R Channels Front L/R Channels
      Compressed Music Enhancer Advanced Music Optimizer 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
      Direct Mode
      Pure Audio Mode
      Pure Direct Analog Path Mode
      Virtual Speakers T-D (Theater-Dimensional)
      CALIBRATION Onkyo TX-SR353 Onkyo TX-NR555
      Auto Speaker Calibration System with Mic. AccuEQ AccuEQ with AccuReflex™
      VIDEO FEATURES Onkyo TX-SR353 Onkyo TX-NR555
      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 (3 inputs / 1 output)
      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 (RGB/YCbCr4:4:4)
      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
      isf Certified Calibration Control
      CONNECTIVITY Onkyo TX-SR353 Onkyo TX-NR555
      Wi-Fi
      Bluetooth 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 iPod, iPhone and iPad
      Remote AppOnkyo Remote App for iPod touch/iPhone and Android-Powered Devices
      InstaPrevue Input Source Prevue
      TERMINALS Onkyo TX-SR353 Onkyo TX-NR555
      HDMI Inputs46
      HDMI Outputs11
      8K Inputs
      USB Input1 (Front)1 (Rear)
      USB DC Out Port
      Optical Inputs12
      Optical Outputs
      Coaxial Inputs11
      RCA Line Inputs37 (1 Front)
      RCA Line Outputs
      XLR Line Inputs
      Phono Input
      Multi-Channel Input
      RCA Pre-Outs0.10.2
      XLR Pre-outs
      Composite Video Inputs22
      Composite Video Outputs1
      S-Video Inputs
      S-Video Outputs
      Component Video Inputs2
      Component Video Outputs
      Ethernet
      Ethernet Switch
      PC In
      Front A/V InputsUSBMini-Jack
      Speaker A/B
      Headphone Out6.3 mm (1/4")6.3 mm (1/4")
      Detachable Power Cord
      uport
      ZONES Onkyo TX-SR353 Onkyo TX-NR555
      Number of Zones12
      Powered Zones 2
      Zone 2 OutsRCA Line Out
      Whole House Mode
      RS-232C Interface
      +12V Trigger Output00
      Remote (IR) Input/Output0 / 00 / 0
      MISCELLANEOUS Onkyo TX-SR353 Onkyo TX-NR555
      On-Screen Display Overlaid On-Screen Display (OSD) via HDMI with Quick Set-Up
      GUI Languages7
      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 Onkyo TX-SR353 Onkyo TX-NR555
      Analog Tuner FM/AM FM/AM
      Presets3040
      Digital Radio
      Internet Radio TuneIn
      Pandora
      Spotify
      Tidal
      Deezer
      Napster
      SiriusXM
      CONSTRUCTION Onkyo TX-SR353 Onkyo TX-NR555
      Solid Aluminum Front
      Speaker Terminals59
      Large Speaker Terminals29
      Color-Coded Speaker Terminals
      Transparent High-Grade Speaker Terminals
      Gold plated RCA terminals
      POWER Onkyo TX-SR353 Onkyo TX-NR555
      Power SupplyAC 120 V, 60 HzAC 120 V, 60 Hz
      Independent Power Supply
      H.C.P.S. (High Current Power Supply) Massive High Power Transformer
      Toroidal Transformer
      Power Consumption210 W460 W
      No Sound Power55 W
      Standby Power0.45 W0.1 W
      ECO Mode / Hybrid Standby Function
      PHYSICAL Onkyo TX-SR353 Onkyo TX-NR555
      Dimensions (W x H x D)435 mm x 168 mm x 326.5 mm
      17-1/8" x 6-5/8" x 12-7/8"      		435 mm x 173.5 mm x 378 mm
      17-1/8" x 6-13/16" x 14-7/8"
      Weight8.0 kg (17 lb 10 oz)9.4 kg (20.7 lbs)
      SPECIFICATIONS Onkyo TX-SR353 Onkyo TX-NR555
      Power Output (8 Ω, 20 Hz - 20 kHz, 2 channel driven, FTC)80 W (0.08% THD)80 W (0.08% THD)
      Power Output (6 Ω, 1 kHz, 1 channel driven, FTC)140 W (1.0% THD)140 W (0.9% THD)
      Dynamic Power per Channel (3 Ω, Front)160 W
      Dynamic Power per Channel (4 Ω, Front)125 W
      Dynamic Power per Channel (8 Ω, Front)85 W
      THD0.06% (20 Hz - 20 kHz, 8 Ω, 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 (1 kHz, 100 W/8 Ω)
      Input Sensitivity and Impedance (Phono MM)3.5 mV/47 kΩ
      Rated Headphone Jack Output Level and Impedance330 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)98 dB106 dB
      S/N Ratio (Phono MM, IHF-A)80 dB
      Frequency Response (Analog In)5 Hz - 100 kHz/0 dB, -3 dB (Direct mode)10 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 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 Version4․1 + LE
      Bluetooth Frequency2.4 GHz
      USB Terminal5 V, 1 A
      FM Frequency87.5 MHz - 108.0 MHz87.5 MHz - 107.9 MHz
      AM Frequency530 kHz - 1700 kHz530 kHz - 1710 kHz
      Warranty2 Years2 Years

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

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