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.
| Weight | 6.3 lbs |
|---|---|
| Dimensions | 15 × 8.5 × 4 in |
| Type |
Amplifier |
| Brand |
MB Quart |
| Series |
Reference |
| Category |
Mobile |
| Condition |
New |
| Color |
Black |
| Warranty |
1 Year |
| Compatible Vehicles |
Universal |
| Amp Class |
Class SQ (Class D) |
| Amp Total Channels |
4 |
| Amp Max Power (watts) |
280 |
| Amp Power @ 2 Ohms (ch x watts) |
4 x 70 |
| Amp Power @ 4 Ohms (ch x watts) |
4 x 50 |
| Amp Crossover |
Electronic |
| Amp Variable High Pass Crossover 12dB per Octave |
CH1 & CH2: Switched Full/HPF/LPF 50Hz-250Hz, CH3 & CH4: Switched Full/HPF/LPF 50Hz-250Hz |
| Amp Variable Low Pass Crossover 12dB per Octave |
CH1 & CH2: Switched Full/HPF/LPF 50Hz-250Hz, CH3 & CH4: Switched Full/HPF/LPF 50Hz-250Hz |
| Amp Bass Boost |
0-9dB |
| Amp Subsonic Filter |
N/A |
| Amp Variable Voltage |
0.02-9V |
| Amp Signal to Noise |
> 101dB |
| Amp Frequency Response |
10Hz-35Hz |
| Amp Total Harmonic Distortion (THD) |
< 0.09% |
| Amp Speaker Level Audio Inputs |
RCA |
| Amp Power Terminal 12v/GND |
4 AWG |
| Amp Speaker Terminal Wire Gauge |
12 AWG |
| Amp Fusing |
40A External |
| Proposition 65 Notice | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| 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 dissipates heat to allow the amplifier to run lower impedance for longer duration. |
| Power Supply |
Rugged MOSFET Pulse Width Modulation power supply: Allows amplifier to produce 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. |
