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  • HDMI® 1.4a Support for 3D Video and Audio Return Channel
  • Decoding of High-Definition Surround-Sound Codecs
  • Universal Port for Optional Onkyo Dock for iPhone™/iPod® or DAB+ Radio Tuner
  • Convenient Overlaid On-Screen Display via HDMI
  • Four Game Modes for More Realistic Action

5.1-Channel Home Cinema Receiver

The Ideal Choice for Newcomers - a High-Value Home Cinema Centerpiece

At the budget-conscious end of the home entertainment spectrum, you’re looking to maximize performance and features without putting undue strain on your finances. At Onkyo, we get it. That’s why we’ve redefined the entry-level A/V receiver once more, with the high-value TX-SR308. Not only is it ready for 3D video—thanks to its HDMI™ 1.4a specification—but it also handles high-definition lossless audio codecs from Dolby and DTS. Advanced A/V processing on a bedrock of classic Onkyo engineering is complemented by a bevy of convenient features: a new overlaid On-Screen Display for easy adjustment of settings; a Universal Port for single-cable connection of peripherals; and a front-panel audio input for direct connection of iPods and other MP3 players. With the TX-SR308, you get an affordable home cinema centerpiece ready to drive the latest high-def entertainment sources.



  • HDMI™ Version 1.4a to Support 3D Video Formats, Audio Return Channel, Deep Color™, x.v.Color™, LipSync, Dolby® TrueHD, DTS-HD Master Audio™, DVD-Audio, Super Audio CD, Multichannel PCM, and CEC
  • Dolby® TrueHD, DTS-HD Master Audio™, Dolby® Digital Plus, DTS-HD High-Resolution Audio™ Decoding
  • Universal Port for Single-Cable Connection of Optional Onkyo Dock for iPod or DAB+ Radio Tuner
  • Overlaid On-Screen Display (OSD) via HDMI
  • 100 W/Ch at 6 Ω, 1 kHz, 1 Channel Driven, IEC
  • H.C.P.S. (High Current Power Supply) Massive High Power Transformer
  • Optimum Gain Volume Circuitry
  • Jitter-Cleaning Circuit Technology
  • Burr-Brown 192 kHz/24-Bit DACs (PCM1690) for All Channels
  • Advanced 32-Bit Processing DSP Chip
  • 4 DSP Modes for Gaming: Rock, Sports, Action, and RPG (Role Playing Game)
  • Music Optimizer™ for Compressed Digital Music Files
  • Theater-Dimensional Virtual Surround Function
  • CinemaFILTER™
  • Direct Mode
  • Double Bass Function
  • Non-Scaling Configuration
  • A-Form Listening Mode Memory


  • Audio and 1080p Video Processing via HDMI (3 Inputs and 1 Output)
  • HDTV-Capable (720p/1080i) Component Video Switching (2 Inputs and 1 Output)
  • Front-Panel Audio Input for Portable Devices
  • 3 Digital Inputs (2 Optical and 1 Coaxial)
  • 4 A/V Inputs and 1 Output
  • Video Output (Monitor)
  • 1 Audio Input
  • Subwoofer Pre Out
  • Speaker A/B Terminals
  • Banana Plug-Compatible Speaker Posts for Front L/R Channels (Speaker A)
  • Color-Coded Speaker Terminals
  • Headphone Jack
  • Crossover Adjustment (40/50/60/80/100/120/150/200 Hz)
  • A/V Sync Control Function (Up to 100 ms in 10 ms Steps)
  • Tone Control (Bass/Treble) for Front L/R Channels
  • 3-Mode Display Dimmer (Normal/Dim/Dimmer)
  • Sleep Timer (via Remote)
  • Battery-Free Memory Backup
  • 40 FM/AM Random Presets
  • RIHD (Remote Interactive over HDMI) for System Control
  • Compatible with RI (Remote Interactive) Dock for iPod
  • RI (Remote Interactive) Remote Control




Datasheets Documentation

RSS News

Termination of Gracenote music recognition service on certain Onkyo products

Dear Valued Customer, We regret to inform you that we will terminate Gracenote music recognition service from the ONKYO… more

Press Release dated: 2 Jul 2019
Premium RZ Series AVRs Get a High-Octane Upgrade with Strengthened Amps and IMAX® Enhanced Certification

ONKYO, JAPAN. Onkyo has added two THX® Certified Select™ and IMAX® Enhanced*1 certified Network A/V Receivers to its… more

Press Release dated: 30 Apr 2019
Onkyo issues Firmware Update for Apple AirPlay 2

OSAKA, JAPAN. Onkyo is pleased to confirm the release of a firmware update that will add Apple AirPlay 2 capabilities to… more

Press Release dated: 18 Apr 2019
Onkyo Unveils A High-Performance THX® Certified Select™ AV Receiver and Flexible 3D Audio-Ready Home Cinema Packages

OSAKA, JAPAN. Onkyo is continuing its mission to make home entertainment more immersive and ever more adaptable with the… more

Press Release dated: 26 Mar 2019
Onkyo Launches Value-Packed AVRs with Dolby Atmos® and DTS:X® for 3D Audio Through Any Speaker Layout

OSAKA, JAPAN. Onkyo presents a persuasive value proposition with two Dolby Atmos and DTS:X enabled A/V receivers, the 5.2-ch… more

Press Release dated: 6 Feb 2019