MB Quart FX4.50

400W RMS 4-Channel Formula Series Amplifier
MB Quart FX4.50
  • Formula Series 4-Channel Class A/B Car Amplifier

  • RMS Power Rating:

    • 4 ohms: 50 watts x 4 chan.

    • 2 ohms: 100 watts x 4 chan.

    • Bridged, 4 ohms: 200 watts x 2 chan


  • PWM (Pulse Width Modulated) MOSFET power supply

  • LED power (green) and protect (red) indicators

  • Variable Bass Boost (0 to +9 dB bass boost at 45 Hz

  • 4/3/2 Channel operation

  • Unbalanced RCA input jack

  • Preamp RCA outputs to daisy chain multiple amps

  • 4-Way System Protection circuitry (DC, thermal, overload, and speaker short protection)

  • Heavy duty aluminum alloy convection heatsink for superb heat dissipation

  • Silver-plated RCA level inputs

  • Silver-plated screw terminals

  • Input sensitivity:

    • Low level: 200mV-6V



  • Signal to noise ratio: 90dB

  • Channel separation: 80dB

  • Variable low-pass filter: 30-150 Hz

  • Variable high-pass filer: 10-1200 Hx

  • LP/HP/Full crossover switch

  • Damping factor: >180

  • Frequency response: 10-45,000 Hz

  • Dimensions: 12"L x 9-1/2"W x 2-1/4"H

  • Price: $95