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*RARE* Phoenix Gold Ryval Designs A4.50 Power Amplifier

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Phoenix Gold Ryval Designs A4.50 – Vintage 4-Channel Car Audio Power Amplifier | 70W × 4 at 4Ω

Part of Phoenix Gold's early-2000s Ryval Designs series, the A4.50 is a four-channel automotive power amplifier representing an era when substantial aluminium heatsinks, MOSFET power supplies and distinctive amplifier styling were prominent features of aftermarket car audio. Delivering a manufacturer-rated 70 watts per channel at 4 ohms, the A4.50 combines flexible crossover configurations with gold-plated connections and a signature blue-illuminated Ryval Designs logo. For collectors and enthusiasts, it offers a nostalgic piece of Phoenix Gold's amplifier history.

  • New Old Stock (NOS) condition.
  • Never been installed or used. 
  • Supplied in its original box.
All OSCA Vintage Series products have been professionally power-on tested, functionally tested and fully bench-tested.
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Product details

Advanced Specifications
  • Brand: Phoenix Gold
  • Series: Ryval Designs
  • Model: A4.50
  • Era: Early 2000s
  • Amplifier configuration: 4-channel
  • Power output at 4Ω stereo: 70W × 4 at 14.4V DC
  • Power output at 2Ω stereo: 120W × 4 at 14.4V DC
  • Power output at 4Ω bridged: 240W × 2 at 14.4V DC
  • Recommended fuse size: 2 × 20A ATO-style
  • Dimensions: 14.0 L × 9.0 W × 2.25 H
Key Features
  • Blue-Illuminated Logo features distinctive laser-etched branding with classic early-2000s styling.
  • Heavy-Duty Aluminium Heatsink provides effective heat management and solid construction.
  • MOSFET Power Supply delivers stable power and strong audio performance.
  • Adjustable Crossovers allow flexible speaker configurations with high-pass and low-pass filters.
  • Gold-Plated Connections provide reliable connectivity for power, speakers and RCA inputs.
  • Auxiliary RCA Outputs allow easy connection to additional amplifiers.
Best Suited For

Phoenix Gold collectors preserving vintage car audio equipment or early-2000s-inspired vehicle system projects.
Phoenix Gold A4.50 Tech Specs

Phoenix Gold — The Early-2000s Car Audio Scene

By the early 2000s, Phoenix Gold was already an established name among car audio enthusiasts, having built its reputation through iconic amplifier ranges such as the MS and M series. It was an era of custom boot installations, powerful subwoofer systems, illuminated equipment and a growing culture of enthusiasts showcasing their builds. The Ryval Designs series belonged to this generation, offering Phoenix Gold amplification with the distinctive styling and system flexibility popular at the time. Today, these amplifiers represent a nostalgic chapter in car audio history, recalling an era when the equipment itself was often as much a part of the build as the sound.

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