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Phoenix Gold SX Series 400W Mono-Block Amplifier

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Phoenix Gold SX Series 400W Mono-Block Amplifier

Phoenix Gold SX amplifiers are high quality and powerful. At around 2" high it is small enough to fit in tight spaces, and most are around 80% efficient. The SX series are an excellent choice for almost anyone, from someone looking for a component amp to those looking for powerful hard hitting bass. All at an affordable price.

These amps are used and may still have minor cosmetic blemishes. The SX 400.1 comes with the mounting screw, allan keys, bass knob, and box


  • Ultra Efficient Class D Topology
  • Compact Size for Easy Installation
  • Surface Mount Component Technology
  • RMD - Remote Voltage Display Ready
  • RBCF - Remote Bass Level Control Included
  • Direct Insert Power and Speaker Terminals
  • Audio Precision Quality Control Verification
  • Backlit Blue Phoenix Gold Logo
  • Power Output Birth Certificate

Technical Specs    

  • Frequency Response: ± 1dB from 20Hz to 300Hz
  • Signal to Noise Ratio: >90dB
  • Low Pass Crossover: 12dB per octave
  • Subsonic Filter: 12dB per octave
  • Low Pass Crossover Range: 30Hz to 300Hz
  • Subsonic Crossover Range: 10Hz to 55Hz
  • Bass Boost @ 45Hz: 0 to +18dB
  • Low Level Input Range: 200 millivolts to 8 volts
  • Lowest Recommend Load: 2 ohms
  • Typical Efficiency: 70%
  • Damping Factor: Greater than 200
  • Power 14.4Vdc ≤ 1% THD
  • 400 x 1 @ 2 ohms
  • 250 x 1 @ 4 ohms
  • Recommended Fuse Size: 40 amp
  • Power/Ground Wire Size: 8 Gauge
  • Dimensions (Includes Mounting Feet):
  • 7.4” L x 6.9” W x 2.0” H

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