


RetroSound Quadraphonic 4 Channel Amplifier Full Range Class D Amp 4x45w RMS
RetroSound® Quadraphonic 4-channel Amplifier
Power your whole system with the RetroSound® Quadraphonic amplifier.
The RetroSound® Quadraphonic amplifier is a plug-and-play solution for adding additional power to your classic car stereo system. The Quadraphonic is a 4-channel amplifier and connects directly to your RetroSound radio delivering 45-watts RMS to all four speakers. Pair it with a RetroSound 8" powered subwoofer for a complete audio system that's a breeze to install. The Quadraphonic amplifier offers an exceptional dynamic range and low distortion with built-in variable high-pass filters for both front and rear channels.
Listen to your favorite 60's rockabilly or 80's pop hits in your classic ride with perfect clarity and experience the music the same way you do in your daily driver. Dual gain control allows you to match the input sensitivity to the output of your RetroSound radio for the best possible audio reproduction in your classic vehicle.
The Quadraphonic is a Class D (digital) amplifier with advanced circuitry and thermal overload protection. The amplifier's ultra-low current draw, advanced shielding, and compact size of just 7.05” x 3” x 1.65” allows installation almost anywhere, even behind the dashboard, where most amps fail due to electrical interference! A perfect solution for classic cars where space is limited.
- 4-channel amplifier
- Full-range Class D digital circuitry
- 45-watts RMS x 4 channels full-range @ 4 ohms
- Built-in variable high pass filters
- Advanced circuitry and thermal protection
- Directly connects to your RetroSound radio
- Works with any aftermarket radio with low-level RCA outputs
- Compact size fits almost anywhere
- Dimensions: 7.05” x 3” x 1.65”(17.9 cm x 7.1 cm x 4.2 cm)
Specification
Part Number: Quadraphonic
- 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 Ratio (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) 7.05” x 3” x 1.65”
- Dimensions (cm) 17.9 cm x 7.1 cm x 4.2 cm
What's Included
1 Year Warranty
- Quadraphonic Amp
- Screws
About the brand
RetroSound


Classic Car Audio - Radios, Speakers, Amplifiers, & Accessories
Retro Manufacturing is the leading producer of classic car stereos, speakers, amps, & accessories for the automotive restoration industry. Our award-winning RetroSound® radios are available for thousands of classic vehicles!

Radios
RetroSound® radios are modular units that allow you to select the radio face, knobs, and trim that are most period-correct for your classic vehicle and pair it with a selection of radio motors for a choice of audio features and connectivity.

Speakers
RetroSound speakers deliver crystal-clear audio with modern performance, tailored for classic and custom vehicles. Designed to fit seamlessly into vintage interiors, these speakers combine timeless style with advanced technology, offering rich sound quality and durability. Perfect for enhancing your car's audio experience while preserving its classic charm.

Amps & Subwoofers
RetroSound offers high-performance amplifiers and subwoofers designed to deliver exceptional audio clarity and deep bass for vintage and modern vehicles. Engineered with a retro-inspired aesthetic, these products combine classic style with cutting-edge technology, ensuring seamless integration and powerful sound. Perfect for audio enthusiasts seeking superior sound quality without compromising on style.

Build Your Own Radio
Complete the look of your RetroRadio™ From Vintage overlays to Volume Knob and Faceplates, Perfect for complimenting the complete look of your classic.

Accessories
RetroPods are the perfect solution for adding speakers to a classic car or truck without cutting or modifying the original interior. Multi-purpose surface-mount Pods and Speaker Grills.
Antennas
Fully Automatic Operation Powered Antennas, Manual and Hide Away Aerials to keep the classic look classy!

