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Infinity Silver High-Performance Mono Car Amplifier - REF-551A

Abt Model: REF551A | UPC Code: 050667370916
Infinity - REF-551A - Car Audio Amplifiers
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Compact Footprint/ High - And Low - Level Inputs/ Compact Design To Fit In More Vehicles/ Variable Crossovers And Bass Boost/ ≥80dB Signal-To-Noise Ratio/ 1300W Peak Max Power/ HALOsonic Mixing Input/ Silver Finish
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Your Shipping Zip Code: 20149 (change)

Estimated Delivery Date: 
Nov 22nd *

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Product Details

Infinity Silver High-Performance Mono Car Amplifier - REF-551A

New Infinity Reference amplifiers deliver pure power from a slim, compact chassis that’s designed to fit in more vehicles. Available in 4-channel, 5-channel, and mono models, Reference amps incorporate our latest amplifier topology, include variable electronic crossovers and bass boost control for precise system tuning, and feature high- and low-level inputs for easy interface with virtually any system. They’re also compatible with several new vehicle technologies, including many advanced driver assistance systems, and Harman HALOsonic, a suite of acoustic solutions that can simulate engine sounds for a better driving experience in hybrids and electric cars, cancel road noise for better-sounding music, and more


  • Compact footprint
    Infinity Reference amplifiers are designed with a compact chassis and small footprint to ease installation, even if available space is limited.
  • High- and low-level inputs
    Speaker-level and low-level inputs allow Reference amps to work with just about any car stereo, aftermarket or factory.
  • Variable crossovers and bass boost
    Unlike many amplifiers available at similar prices, Reference amps feature variable electronic crossovers and bass boost circuit to allow for fine-tuning.
  • ADAS input with channel assignment
    In vehicles with ADAS warning systems, you can assign a channel to broadcast system alert messages.
  • HALOsonic mixing input
    Reference amps can also work with the HALOsonic systems of select vehicles, which helps reduce external noise for a better sonic experience.



  • High-performance mono car amplifier
  • Compact design to fit in more vehicles
  • High- and low-level inputs to work with virtually any stereo
  • Variable crossovers and bass boost
  • Signal-to-Noise Ratio: ≥80dB (ref 1W output @ 2Ω)
  • Max Power: 1300W Peak


  • Power Output, 2Ω: 550W RMS x 1, <1.0% THD+N
  • Power Output, 4Ω: 370W RMS x 1, <1.0% THD+N

In the Box:

  • 1 amplifier
  • High-level input wiring harness
  • 2 spare fuses
  • 2 2-color brand stickers
  • Quick start guide

Approximate Weight:

  • Shipping: 7 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): 1 Year Limited
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More reasons to buy the Infinity REF-551A from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The Infinity REF-551A is Brand New.
  • The Infinity REF-551A Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Number of Channels1
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