MB Quart RA1-300.1 Reference 300 Watt Mono Block Amplifier

Brand: MB Quart
Model Number: RA1-300.1
UPC: 806576232643
Model Number: RA1-300.1
UPC: 806576232643
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MB Quart RA1-300.1 Reference 300 Watt Mono Block Amplifier

  • 175 watts RMS x 1 at 4 ohms
  • 325 watts RMS x 1 at 2 ohms
  • variable low-pass filter (50-250 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • switchable subsonic filter (Off/25 Hz, 12 dB/octave)
  • wired remote bass level control included
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Product Description

Features & Specifications



MB Quart RA1-300.1 Reference 300 Watt Mono Block Amplifier

MB Quart Reference series mono subwoofer car audio amplifier featuring innovative sound quality and power technology. The RA1-300.1 is a 300 watt 1 ohm stable car audio amplifier. Reference amplifiers feature DC Sensing to allow any amplifier to be easy integrated into an OEM system by simply adapting a RCA cable from the source unit. Bass remote is included.

Low Noise Preamplifier Circuit

Q-Stasis Pre Amplifier Stage: Maximum low voltage signal from the source unit comes into the amplifier circuit with minimal distortion.

RCA Inputs

Nickel-Plated: High temperature impact resistant with hex screw terminals that allow for secure connections and is erosion resistant.

High Level Inputs

See Auto-Sense Feature.

Operation Mode

Mono only

Crossover Type

Variable electronic crossovers allow for complete control of the sound.

Electronic Equalizer

Control of amplifier output with on-board electronic crossover to tailor specific frequencies to speakers and subwoofers. Check specifications for specific frequencies for this amplifier.

Class / Topology

Class Q1 Mono (Class D): MB Quart’s Class Q1 offers the efficiency of today’s D-Class with increased engineering to focus on sound quality from the power supply through the output devices, the FLUID-FETS.

Output Device Technology

FLUID-FETS: MB Quart output devices, FLUID-FETS are painstakingly selected for their ability to efficiently produce power and mimic the sound quality of the highest end home amplifiers.

Heat Sink

Aluminum: Quickly dissapates heat to allow the amplifer to run lower impedance for longer duration.

Power Supply

Rugged MOSFET Pulse Width Modulation power supply: Allows amplifier to product efficient power without taxing the vehicle electrical system.

Output Connections

Heavy duty connections allow for secure electrical signal to pass into wiring and resist erosion which will add longevity to the amplifier.

Connection Type

Secure connection for all power, ground and speaker connections.

Bass Remote Included

Included: Wired Bass Remote allows adjustments to bass frequencies to be made from the control mounted anywhere in the vehicle.

Auto Turn-On

DC SIGNAL SENSE: The DC SIGNAL SENSE switch will allow the amp to turn on when a signal is received on the RCA inputs, so an amplifier remote turn on wire is not needed to turn on the amplifier. This feature can also be turned off.

Brand MB Quart   Model MB Quart RA1-300.1
Product: MB Quart RA1-300.1 Reference 300 Watt Mono Block Amplifier

Weight: 5.7 lbs
Dimensions: 16.5 × 8.5 × 4 in
Series: Reference
Compatible Vehicles: Universal
Amp Class: Class Q1 Mono (Class D)
Total Channels: 1
Max Power (watts): 300
Power @ 2 Ohms (ch x watts): 1 x 325
Power @ 4 Ohms (ch x watts): 1 x 175
Crossover: Electronic
Variable Low Pass Crossover 12dB per Octave: Variable 50Hz-250Hz
Bass Boost: 0-12dB
Subsonic Filter: OFF/25Hz
Variable Voltage: 0.02-9V
Signal to Noise: > 91dB
Frequency Response: 25Hz-250Hz
Total Harmonic Distortion (THD): < 0.09%
Speaker Level Audio Inputs: RCA
Power Terminal 12v/GND: 4 AWG
Speaker Terminal Wire Gauge: 12 AWG
Fusing: 40A External

What's in the box

MB Quart RA1-300.1 owner's manual
Mono amplifier
Remote level control
16' Remote level control cable (RJ-45 connectors on both ends)
4mm Allen key
2mm Allen key
Two 3/8" screws
Four 5/8" screws
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Quickstart guide

Mobile Amplifier Channels

1 Channel (Mono)

Mobile Amplifier Class

Class D

Mobile Amplifier Features

Bass Boost, Low-Pass Filter, Speaker Level Inputs, Subsonic Filter

Mobile Amplifier Fuse Rating


Mobile Amplifier RMS

201 to 350 watts

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MB Quart 1 Year Limited Warranty


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