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Infinity > 
Item#: 0HF-000C-00001

Infinity 475a Reference Series 4-Channel Amplifier

  • Class AB 4-Channel Amplifier
  • 75 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
  • 180 watts RMS x 2 at 4 ohms in bridged mode
  • MOSFET power supply
  • Variable high and low-pass filters
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Infinity Reference Series Four-Channel Amplifier



A Four-Channel, Full-Range Amplifier with On-Board Electronic Crossover and Variable Bass Boost

The RCA low-level inputs on the 475a allow for connection to both a preamp level signal and direct connection to a high-level factory head unit.

The 475a comes outfitted with a variable 12dB per octave electronic crossover, allowing you to optimize system tuning based on speaker location and the accompanying loudspeaker components.

A variable bass boost circuit is provided to optimize the low frequency performance of your system.

Full-range preamp outputs are provided, facilitating multiple amplifier hookups without the need for costly Y-adapters or signal splitters.

The Reference 475a's high-output PWM MOSFET power supply ensures optimum power delivery into numerous impedances with low distortion.


Infinity Infinity

Learn more about the Infinity REF475A






Amplifier Class
Class AB


Max Power
480 W
Bridged Power
180 Watt x 2 Channel @ 4 Ohm Bridged


4-Channel full-range amplifier with on-board electronic crossover and variable bass boost

12dB variable bass boost circuit is provided to optimize the low frequency performance of your system

Variable 12dB per octave electronic crossover allows you to optimize system tuning based on speakers and location

Full-range preamp outputs facilitate use of multiple amplifiers without the need for adapters or signal splitters

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

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Home > 
Automotive > 
Car Electronics > 
Car Amplifiers > 
Infinity > 
Item#: 0HF-000C-00001
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