RA1-1500.1 - Receiver MB QUART - Free user manual and instructions
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| Product Type | Monoblock Car Audio Amplifier |
| Brand | MB Quart |
| Model | RA1-1500.1 |
| Amplifier Class | Class D |
| RMS Power (1 Ohm) | 1500W x 1 |
| RMS Power (2 Ohm) | 900W x 1 |
| RMS Power (4 Ohm) | 500W x 1 |
| Frequency Response | 20 Hz – 250 Hz |
| Low-Pass Filter | Variable 40 – 250 Hz |
| Subsonic Filter | Fixed 20 Hz |
| Bass Boost | 0 – 18 dB at 45 Hz |
| Input Sensitivity | 0.2V – 6V |
| Fuse Rating | 50A (2 x 25A) |
| Dimensions (L x W x H) | 12.6 x 2.1 x 9.8 in |
| Weight | 7.5 lbs |
| Power Supply | 12V DC (10 – 16V) |
| Cooling | Convection with heatsink |
| Protection Circuitry | Thermal, short circuit, overvoltage |
| Recommended Speaker Impedance | 1 – 4 Ohm |
| Remote Level Control | Included (wired) |
| LED Indicator | Power (blue), Protection (red) |
Frequently Asked Questions - RA1-1500.1 MB QUART
What is the recommended fuse size for the MB Quart RA1-1500.1?
Use a 50A inline fuse (two 25A fuses if using a distribution block) on the power wire near the battery.
Can I bridge the RA1-1500.1?
No, this is a monoblock amplifier designed for a single subwoofer or a parallel/series load. It cannot be bridged with another amplifier.
What is the minimum speaker impedance?
The amplifier is stable down to 1 Ohm. Running a lower impedance may cause overheating and trigger protection.
How do I set the gain properly?
Set the head unit volume to about 75% of max, turn the gain knob fully counterclockwise, then slowly increase until you hear distortion, then back off slightly.
Why does my amplifier go into protection mode?
Common causes include: short circuit on speaker wires, low impedance (below 1 Ohm), overheating, or voltage drop below 10V. Check connections and cooling.
What size power wire should I use?
For up to 1500W RMS, use at least 4 AWG copper wire for runs up to 4 meters (13 feet). For longer runs, upgrade to 2 AWG.
Does this amplifier require a remote turn-on connection?
Yes, connect the remote terminal (REM) to the head unit's remote output or a 12V switched source. Without it, the amplifier will not turn on.
What is the purpose of the subsonic filter?
The subsonic filter (fixed at 20 Hz) attenuates frequencies below 20 Hz to prevent damage to the subwoofer from infrasonic signals (e.g., from ported enclosures).
Can I use this amplifier with a factory head unit?
Yes, but you may need a line output converter if your factory stereo lacks preamp outputs. The RA1-1500.1 accepts high-level inputs via the included wiring harness.
How do I connect multiple subwoofers?
Wire them in series/parallel to achieve a final impedance between 1 and 4 Ohms. For example, two 4 Ohm DVC subs wired in parallel to 1 Ohm. Ensure the total RMS power does not exceed 1500W.
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USER MANUAL RA1-1500.1 MB QUART
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Product information
Brand : MB QUART
Model : RA1-1500.1
Category : Receiver