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MB Quart RA1-280.4

Reference Series 4-channel car amplifier — 50 watts RMS x 4

Item # 049RA12804

MB Quart's Reference Series RA1-280.4 four-channel amplifier provides 50 watts of power to two pairs of speakers,...

Find what Fits your vehicle

MB Quart's Reference Series RA1-280.4 four-channel amplifier provides 50 watts of power to two pairs of speakers,...

California customers:
Please click here for your Proposition 65 warning.

In stock
$229.99

About the MB Quart RA1-280.4

Power your music

MB Quart's Reference Series RA1-280.4 four-channel amplifier provides 50 watts of power to two pairs of speakers, so you can hear and feel your music clearly over road and engine noise. Designed to power high-quality aftermarket speakers, like their Reference Series speakers and components, this Class D amplifier utilizes MB Quart's unique Q-Stasis (Class SQ) circuitry to improve the accuracy and clarity of your music.

Power your music

MB Quart's Reference Series RA1-280.4 four-channel amplifier provides 50 watts of power to two pairs of speakers, so you can hear and feel your music clearly over road and engine noise. Designed to power high-quality aftermarket speakers, like their Reference Series speakers and components, this Class D amplifier utilizes MB Quart's unique Q-Stasis (Class SQ) circuitry to improve the accuracy and clarity of your music.

Versatile features

The amplifier's features include speaker-level inputs with signal-sensing amp turn-on, so it's ready to work in almost any system. A high-pass filter shapes the signal to fit your full-range speakers for their best-sounding output. You can also configure this amp for two-channel operation to power a pair of subwoofers with up to 140 watts each or for three-channel operation to power a pair of speakers with 50 watts each while powering a sub with 140 watts. A low-pass filter and a bass boost EQ help dial in just the right kind of bass bump you like.

MB Quart RA1-280.4

RA1-280.4 power and output connection panel

READ LESS

Product highlights:

  • 4-channel car amplifier
    • 50 watts RMS x 4 at 4 ohms
    • 70 watts RMS x 4 at 2 ohms
    • 140 watts RMS x 2 bridged at 4 ohms
  • variable low- and high-pass filters (50-250 Hz, 12 dB/octave)
  • variable bass boost (0-9 dB at 45 Hz)
More Info:
  • preamp and speaker-level inputs
    • speaker wire-to-RCA adapters required for speaker-level input
    • DC offset-sensing turn-on with speaker-level input
  • wiring, fuse, and hardware not included with amplifier
    • 4-gauge power and ground leads and a 40A fuse recommended
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # RA1-280.4

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Customer Q&A

1 question already asked

Q
What is the dimensions of this amp? Is the bass boost EQ useable without using the LPF option?
[ Psboodram  Oct 13, 2021 ]
1 answer
A
We have not yet completed our research on this amp and don't yet know its dimensions. I don't have an ETA on when we will have completed our research but once we have, we will list the dimensions of it right on the web page. The bass boost can be used regardless of the X-over choice (high pass, low pass, or off).
[ Paul  Oct 16, 2021 ]  Staff

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