MB Quart RA1-280.4 Reference 280 Watt 4 Channel Amplifier

MB Quart Reference series four channel car audio amplifier featuring innovative sound quality and power technology. The RA1-280.4 is a 280 watt 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.

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.

RA1-280.4 Features:

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: 2 / 4 Channel
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 SQ: Multi-channel amplifiers utilize the unique MB Quart Class SQ topology. Matched with Q-Stasis the sonic accuracy and clarity exceeds standard Class D amplifiers.
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.
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.