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Infinity REF475A Reference Series Full-Range Amplifier - 4 Channels, 300W RMS, 12dB Built-in Variable Electronic Crossover

Item#:  I55-4048  | Model#: REF475A

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Infinity REF475A Reference Series Amplifier Product Details

Amplifier 300 Watts

Infinity Reference Series Full-Range Amplifier
Get exceptional sound quality with the Infinity Reference Series Full-Range Amplifier. This Full-Range Amplifier comes with 300W RMS and 4 Channels for a powerful sound system. Coming with 12dB electronic crossovers, it maximizes your system tuning option depending on speaker your selections and location. You can attach multiple amplifier without using costly Y-adapters or signal splitters as it includes a port for future expansion. Purchase the Infinity Reference Series Full-Range Amplifier today.

What It Is And Why You Need It:

  • 300W RMS; supplies sufficient power for heavy pounding sound
  • 4 Channels; maximizes sound performance
  • 12dB electronic crossovers; provides different tuning options for systems of different sizes


  • Power Output: 75 watts RMS x 4 channels at 4 ohms and = 1% THD + N ; 180 watts RMS x 2 at 4 ohms, 14.4V supply and = 1% THD + N
  • Signal-to-Noise Ratio: 85dBA (reference 1 watt at 4 ohms)
  • Dynamic Power : 117 watts at 2 ohms
  • Effective Damping Factor: 6.315 at 4 ohms
  • Frequency Response (-3dB): 10Hz to 100kHz (-3dB)
  • Maximum Input Signal: 6V
  • Maximum Sensitivity: 100mV
  • 12dB built-in variable electronic crossover
  • Variable bass-boost (0 to +6dB @ 50Hz)
  • Port for future accessory products
  • Remote bass-level control included
  • Manufactured by: Infinity by Harman
    Warranty provided by: Infinity by Harman
    Limited Warranty: 12 months parts; 12 months labor
    Mfg Part No: REF475A
    UPC No: 005066734993
    Box Size: ( Length:0, Width:0, Depth:0)
    Shipping Weight: 3.0000 pound(s)
    Click here for full warranty and support information
  • Limited Warranty: A full text version of the limited warranty may be obtained by mailing a self addressed, stamped envelope to the address below and requesting the warranty for item number: I55-4048
    Warranty Information
    7795 W. Flagler St. Suite 35
    Miami, FL. 33144

  • Infinity by Harman logos are registered trademarks of Infinity by Harman. All others trademarks and copyrights mentioned herein are the property of their respective owners.