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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 has a built-in high pass/full range crossover, and its diminutive size means you can install it virtually anywhere, including behind the dash. 45 watts x 4 channels continuous power output Full range Class D digital circuitry Ultra-low current draw Advanced protection circuitry 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
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🇺🇸 Ship from USA · On Agora since 2026
$179.99