Description
Overview
The MB Quart NA4-400.2RC Nautic is a compact 2-channel amplifier designed for marine and powersports applications, featuring direct compatibility with Polaris® RIDE COMMAND® systems. Built to deliver reliable performance in harsh environments, it combines efficient Class D power with a rugged, waterproof design.
With 400 watts of total output, this amplifier is engineered for clean, consistent power delivery while maintaining a compact footprint ideal for tight installation spaces.
Key Features
- 400W max 2-channel amplifier with Polaris® RIDE COMMAND® compatibility
- IP67-rated waterproof and dustproof construction with fully potted internals
- Fixed 80Hz high-pass crossover for simplified system tuning
- Q-Stasis low-noise preamp for improved signal clarity
- Quick-connect power, speaker, and RCA connections for easy installation
Engineering & Protection
Designed for extreme environments, the NA4-400.2RC features fully potted internal components that seal out moisture, dust, and contaminants. This construction, combined with an IP67 rating, ensures long-term durability in marine and off-road applications.
A PWM MOSFET power supply and aluminum heatsink design provide efficient power delivery and effective heat dissipation, allowing the amplifier to maintain performance under demanding conditions.
Audio Performance
The integrated Q-Stasis preamplifier circuit reduces incoming signal noise, helping deliver cleaner and more detailed sound. With a frequency response of 80Hz to 20kHz and a signal-to-noise ratio greater than 105 dB, this amplifier is optimized for midrange and high-frequency speaker systems.
A fixed 80Hz high-pass crossover helps protect connected speakers while simplifying system setup.
Installation & Connectivity
The compact chassis and quick-connect terminals make installation fast and efficient. The amplifier uses corrosion-resistant nickel-plated RCA inputs and connectors, ensuring secure and reliable connections in demanding environments.
Integrated protection circuitry monitors thermal, overload, DC, and speaker short conditions, with LED indicators providing real-time system status.
Specifications
| Model | NA4-400.2RC |
|---|---|
| Channels | 2 |
| Amplifier Class | Class D (Full Range) |
| Max Power | 400W |
| Power @ 4 Ohms | 2 x 100W |
| Power @ 2 Ohms | 2 x 200W |
| Frequency Response | 80Hz – 20kHz |
| Signal to Noise Ratio | >105 dB |
| Total Harmonic Distortion | 1.0% |
| High Pass Crossover | Fixed 80Hz (12 dB/Octave) |
| Input Sensitivity | 0.2V – 9V |
| IP Rating | IP67 |
| Fuse Rating | 30A x 1 |