Free Shipping* on orders over $300!
(*lower 48 states only)
Cart 0
COVID-19 is continuing to cause shipping delays with individual carriers. Please check with your shipping provider directly (FedEx/USPS) for more specific updates.

Find Your Vehicle

Quadraphonic Four-channel Power Amplifier

Quadraphonic Four-channel Power Amplifier-RetroSound
Part Number:

If you are shipping to AU, BE, BR, CH, CZ, DE, FR, GB, JP, NL, NO, NZ, RU, SE, or ZA use our Dealer Locator to find a dealer near you.

The RetroSound® Quadraphonic is a full-range Class D (digital) power amplifier that plugs directly into any RetroSound® radio. Featuring 45 watts x 4 RMS power, Quadraphonic offers exceptional dynamic range and low distortion for the best possible sound reproduction from your RetroSound® audio system. Low level RCA inputs also allow Quadraphonic to be used with any aftermarket car stereo system. Quadraphonic is shielded, so it can be mounted behind the dash next to the radio without the need to worry about electrical interference. Quadraphonic has a built-in high pass/full range crossover, and its diminutive size means you can install it virtually anywhere.

  • 45 watts x 4 channels continuous power output
  • Full range Class D digital circuitry
  • Ultra-low current draw
  • Advanced protection circuitry
  • Shielded to prevent interference with the radio
  • Built-in variable high pass/full range crossover
  • Direct connection compatibility with all RetroSound® radios
  • Compact size (7 1/4 x 3 x 1 3/4 inches / 179 x 71 x 44mm) to fit virtually anywhere

For more information, see the user's manual, or browse our support page.

Power Output 45 watts x 4 channels RMS @ 4 Ohms
Peak Output 55 watts x 4 channels
Total Harmonic Distortion <0.2% @ 45 watts x 4 RMS
Frequency Response 28Hz-28KHz
Signal to Noise Ration (EIA Rated) >90dB
Input Sensitivity 200mV-6.0 volts
Crossover Slope 12dB per octave
Crossover Frequency 100 Hz
Fuse 15 amp ATC Style
Dimensions (inches) 7.16” W x 2.9” D x 1.78” H
Dimensions (mm) 179mm W x 71mm D x 44mm H

More Amps & Subwoofers