MB Quart REF4.50

400W RMS Reference Series 4-Channel Amplifier
MB Quart REF4.50
  • Reference 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.



  • Pulse Width Modulated MOSFET power supply

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

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

  • Soft Start Turn-on

  • 4/3/2 channel operation

  • Preamp RCA outputs to daisy chain multiple amps

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

  • Heavy duty aluminum alloy heatsink for extreme heat dissipation

  • Nickel-plated RCA level inputs

  • Nickel-plated screw terminals

  • Input sensitivity:

    • Level: 200mV-6V



  • Variable high-pass filter (15-250 Hz, 24 dB/octave)

  • Variable low-pass filter (30-250 Hz, 24 dB/octave)

  • Damping factor: >180

  • Frequency response: 15-45,000 Hz

  • Dimensions: 11-1/16"L x 7-3/4"W x 1-7/8"H

  • Price: $110