NA2-320.4

Compact 4-Channel Powersports Amplifier Power

The MB Quart NA2-320.4 Compact 4-Channel Powersports Amplifier delivers efficient, reliable audio power in a small, rugged design built for marine and powersports environments. With up to 320 watts total output, this Class D amplifier is engineered to enhance full-range speaker systems in motorcycles, ATVs, UTVs, boats, and other compact audio setups.

Its efficient design ensures strong performance with minimal heat generation, making it ideal for installations where space is limited but clean, consistent power is essential. Each of the four channels delivers balanced output for front and rear speaker configurations.

Flexible Audio Control with Built-In Tuning

The MB Quart NA2-320.4 amplifier includes onboard tuning features that allow you to shape your sound system for optimal performance. With a variable bass boost of up to +12dB at 45Hz, you can enhance low-frequency response for richer, more impactful audio.

Each channel pair supports high-pass or full-range operation, allowing flexible system setups depending on your speaker configuration. With a wide input voltage range (0.2V–9V) and RCA connectivity, it integrates easily with both factory and aftermarket audio systems.

A high signal-to-noise ratio (>90dB) ensures clean audio output with minimal distortion, preserving clarity even at higher volumes.

Rugged Design Built for Marine & Powersports Use

Built for demanding environments, the NA2-320.4 is certified for marine and powersports applications, making it resistant to vibration and outdoor conditions. Its compact form factor and lightweight construction allow for flexible mounting in tight spaces.

Quick-release Molex connectors simplify installation and maintenance, while the Class D architecture ensures efficient power delivery in all conditions. Despite its small footprint, it delivers strong performance suitable for multi-speaker systems in off-road and marine vehicles.

This amplifier is a dependable solution for users who need durability, simplicity, and solid audio performance in one compact package.

Highlights

• 320 Watts Total 4-Channel Powersports Amplifier
• Efficient Full-Range Class D Amplifier Design
• 80W x 4 @ 2 Ohms Output Power
• 40W x 4 @ 4 Ohms Output Power
• Built for marine and powersports environments
• Variable Bass Boost up to +12dB @ 45Hz
• High-pass / Full-range switchable channels (CH1–CH4)
• Wide 0.2V–9V input voltage compatibility
• High signal-to-noise ratio (>90dB) for clean audio
• Compact design for tight installation spaces
• Quick-release Molex connectors for easy wiring
• Ideal for motorcycles, ATVs, UTVs, and boats

Package Contains

• 1 × MB Quart NA2-320.4 4-Channel Powersports Amplifier
• 1 × Wiring Harness with Molex Connectors
• 1 × Mounting Hardware Kit
• 1 × User / Installation Manual
• Manufacturer Retail Packaging Box