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Infinity M4555A
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 Item# 52553 / Condition:  Brand New

Infinity M4555A

1800W Max Power Class D Multi-Element High Performance 5-Channel 4-Ohm Marine Amplifier Review this product

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Availability :  SPECIAL ORDER ITEM 
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Compact Size

Infinity Marine amplifiers feature a slim chassis and a small footprint to allow for installation in tight spaces.

High- and low-level inputs

Speaker-level and low-level inputs let Infinity Marine amps integrate with just about any audio input.


Selectable Output and Variable Adjustment Crossovers

Infinity Marine amps feature selectable all-, high-, or low-pass crossovers with variable electronic frequency adjustment to allow for fine-tuning multiple system configurations.

Product Value

Infinity power and performance at an affordable price point


Cosmetic Appeal

Product family look and feel to meet the needs of our Infinity customers

Conformal-Coated PCB

Infinity Marine amplifiers are engineered to withstand harsh marine conditions, with fully “marinized” circuit boards to ensure flawless power delivery, year after year


Variable Crossovers

Onboard 12dB electronic crossovers, with selectable full-range, high-pass & low-pass switching, provide tuning options for systems of any size

Big Dynamic Power

Output power is perfectly matched to meet the needs for your Infinity marine products


New weather-resistant & high-performance Infinity Marine amplifiers deliver impressive power from a compact chassis designed to withstand outdoor environments. Available with 4-channel and 5-channel outputs. Infinity Marine amplifiers incorporate our latest amplifier topology that includes selectable all-, high-, or low-pass crossovers with variable electronic frequency adjustment for precision system tuning. Engineered for harsh marine conditions, with power and performance to meet the needs of any outdoor audio system, Infinity Marine amplifiers are the perfect match for all of your Infinity marine products.


  • Max Power: 1800W Peak
  • RMS Power Output @ 2Ω (subwoofer): 500W x 1, <1% THD+N
  • RMS Power Output @ 4Ω (subwoofer): 320W x 1, <1% THD+N
  • RMS Power Output @ 2Ω (full-range): 65W x 4, <1% THD+N
  • RMS Power Output @ 4Ω (full-range): 45W x 4, <1% THD+N
  • RMS Power Output @ 4Ω Bridged (full-range): 130W x 2, <1% THD+N
  • Signal-to-Noise Ratio (sub): >80dB (ref 1W output @ 4Ω)
  • Signal-to-Noise Ratio (full-range): >80dB (ref 1W output @ 4Ω)

What's Included:

  • 1 amplifier
  • Stainless steel mounting hardware
  • Rubber inserts
  • 4 High-level input adapters
  • 3 spare fuses
  • 2 2-color brand stickers
  • Quick start guide
  • UPC: 050667372736
  • Weight: 11
*Warranty: 1 Year Onlinecarstereo.com warranty.
1 Year warranty from Onlinecarstereo.com implies that repairs must be returned to Onlinecarstereo.com, not the manufacturer. More information can be found in our help section under returns & warranties.
What's not covered : Misuse, abuse, defacement, physical damage of any kind, and improper installation / operation. Video and multimedia equipment with damaged or cracked screens.Subwoofers and speakers are not warranted against being blown, burned or abused.