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  • 100 watts per channel minimum into 8 ohms, 1 kHz, DIN
  • Exclusive Vector Linear (VL) Digital technology
  • Optimum Gain Volume Circuitry
  • Pure Stream Power Supply
  • 6 audio inputs and 2 outputs, Phono Input

Integrated Digital Amplifier

Ensuring Higher Music Reproduction through Dedicated Audio Engineering

Digital amplification enables significant power efficiency savings and supports smaller, more compact designs—obvious benefits for today’s home lifestyles. With the A-9555 integrated digital amplifier, sound quality takes precedence over all else. By using Onkyo’s exclusive Vector Linear (VL) Digital technology to remove any spike noise before it introduces errors into the inversion timing, it is possible to get a highly accurate analog-to-digital conversion. Also, at the heart of the A-9555 is a Pure Stream Power Supply--essentially a large power transformer--that ensures that you always have the on-demand power for the clarity and detail of a range of musical genres.


  • 100 watts per channel minimum into 8 ohms, 1 kHz, DIN
  • Exclusive Vector Linear (VL) Digital technology
  • Optimum Gain Volume Circuitry
  • Pure Stream Power Supply
  • All discrete output stage circuitry
  • Low-impedance, thick bus plate
  • Audiophile-grade capacitor
  • Precision motor-driven volume control
  • Tone control (Bass, Treble, Loudness On/Off)
  • Pure direct mode
  • Discrete phono equalizer circuitry
  • 6 audio inputs and 2 outputs
  • Phono input
  • High-rigidity, anti-resonant chassis
  • Aluminum volume and selector knobs
  • Speaker A/B posts
  • Banana plug-compatible speaker posts
  • Headphone jack
  • Heavy-duty power cord (inlet type)
  • Compatible with RI Dock for the iPod
  • RI (Remote Interactive) remote control



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