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OSCA Vintage Collection

*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)
*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)
*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)
*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)
*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)

Vendor:Pheonix Gold

*RARE* Phoenix Gold QX900.1d Vintage Car Audio Amplifier (New-Old-Stock)

Sale price$350.00Regular price $499.00

Early 2000's Car Audio Phoenix Gold QX900.1d Classic USA Amplifier | New Old Stock (NOS)

The Phoenix Gold QX900.1d is a Class D Monoblock amplifier from the brand's early-2000s QX series, an era defined by powerful subwoofer systems, custom installations and growing enthusiasm for high-performance car audio. Featuring a distinctive black anodised heatsink with fly-cut fins and gold-plated connections, the QX900.1d delivers a manufacturer-rated 900W at 2Ω. Combining high-efficiency Class D amplification with adjustable bass controls, this amplifier captures the engineering and unmistakable styling of turn-of-the-millennium Phoenix Gold.

New Old Stock (NOS) condition: Never been installed or used beyond professional testing. Well preserved condition with only a few scratches on the bottom surface. Original packaging and contents is not included.

All OSCA Vintage Series products have been professionally powered-on and functionally bench-tested ✅

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Product details

Advanced Specifications
  • Brand: Phoenix Gold
  • Series: QX
  • Model: QX900.1d
  • Amplifier Configuration: Class D Monoblock
  • Power at 4Ω (12.5V IASCA): 150W × 1
  • Power at 4Ω (14.4V): 475W × 1
  • Power at 2Ω (14.4V): 900W × 1
  • Dynamic Power at 2Ω (14.4V): 1,100W × 1
  • Minimum Load Impedance: 2Ω
  • Frequency Response: 20–330Hz (±1dB)
  • Signal-to-Noise Ratio: Greater than 90dB (20–330Hz)
  • Input Sensitivity: 200mV–4V
  • Low-Pass Crossover: 30–300Hz
  • Crossover Slope: 18dB/octave
  • Subsonic Filter: 20–55Hz
  • Subsonic Filter Slope: 18dB/octave
  • Bass Boost: 0 to +15dB at 45Hz
  • Recommended Fuses: 2 × 40A ATO-style
  • Operating Voltage: 10–15.5V DC
  • Typical Idle Current: Less than 1.5A
  • Chassis Dimensions: 16.75 × 9.5 × 2.0 inches (L × W × H)

Power figures are original manufacturer ratings specified at 1% THD. The 1,100W dynamic power figure is separate from the 900W continuous output rating.

Key Features
  • High-Efficiency Class D Design delivers powerful monoblock amplification for dedicated subwoofer systems.
  • Adjustable Low-Pass Crossover provides 18dB/octave filtering from 30–300Hz.
  • Adjustable Subsonic Filter controls ultra-low frequencies from 20–55Hz.
  • Twin-T Bass Equalisation offers adjustable bass boost of up to +15dB at 45Hz.
  • Black Anodised Heatsink features distinctive fly-cut fins and classic QX styling.
  • Expandable System Connectivity supports optional LPL44 bass control, RMD voltage monitoring and QLink/2 amplifier linking.
OSCA Fun Fact

Back in 2002, car audio enthusiasts were discussing pairing the Phoenix Gold QX900.1d with some of the era's most recognisable subwoofers, including Rockford Fosgate Power HX2s, Kicker L5s and Image Dynamics IDQs. Those old forum discussions offer a nostalgic glimpse into the subwoofer builds, brand rivalries and dream systems that defined early-2000s car audio culture.
Phoenix Gold QX900.1d Owners Manual

Phoenix Gold QX Era — The Gateway Drug

Around the turn of the millennium, Phoenix Gold's QX range formed part of the brand's expansion beyond its earlier enthusiast-focused amplifier generations. The series demonstrated the shift towards consolidated system amplification, combining front, rear and subwoofer outputs in one chassis. During an era of custom boot installations, multiple amplifiers and growing interest in powerful aftermarket sound systems, the QX range offered an alternative to the brand's higher-end amplifier generations while retaining recognisable Phoenix Gold design elements. For enthusiasts discovering serious car audio during this era, the QX range represents that familiar starting point where a casual interest could become a lifelong passion.

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