MB Quart NA2-400.1 Compact Mono Powersports Amplifier

Compact 400-Watt Subwoofer Amplifier for UTVs, Boats & Off-Road Audio

The MB Quart NA2-400.1 is a rugged mono powersports amplifier designed to deliver hard-hitting bass for subwoofers in boats, UTVs, and off-road vehicles. With 400 watts of Class-D power, marine-grade protection, and easy-to-install quick-connect terminals, it's the perfect choice for riders who want deep bass and durable performance.

🛠️ Built for Harsh Environments

Marine & Powersports Certified

• IPX-rated design resists water, dirt, and vibration

• Quick-release Molex connectors for clean installations

• Conformal-coated PCB for extra protection

• Compact chassis fits tight spaces on boats, side-by-sides, and ATVs

🔋 Mono Power for Deep, Punchy Bass

Audio Power Specs

• 500W RMS @ 2 Ohms

• 250W RMS @ 4 Ohms

• Full-range Class D topology for efficiency and low heat

• Low-pass crossover: 12dB/octave filter up to 300Hz

• Bass Boost: 0–12dB at 45Hz

• Subsonic Filter: 60Hz to eliminate unwanted low-end rumble

This mono amplifier for subwoofers delivers precise, powerful bass you can feel—without draining your electrical system.

🎚️ Smart Tuning & Flexible Integration

Onboard Controls & Connections

• Input Sensitivity: 0.2V–9V for OEM or aftermarket radios

• RCA audio inputs for universal compatibility

• Variable filters and equalization for custom tuning

• Molex 10-gauge power/ground terminals

• Speaker output via Molex plug

• Fuse Rating: 1 x 30A

This amplifier is built for simple installation and reliable performance, even in extreme outdoor environments.

🔧 Compact Size, Big Output

• Dimensions: 3.70” W x 5.51” L x 1.77” H

• Weight: 2.09 lbs (0.95 kg)

• Easy to install under seats, in compartments, or custom enclosures

✅ Ideal for All Powersports & Marine Audio Builds

Whether you're building a sound system for your UTV, ATV, boat, or motorcycle, the MB Quart NA2-400.1 is the go-to marine subwoofer amplifier trusted by audio pros.

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