MB Quart Discus Monoblock Marine Amplifier with Top Mounted Controls, 600 Watts - 431773

MB Quart Discus Monoblock Marine Amplifier with Top Mounted Controls, 600 Watts - 431773

Take your marine audio system to the next level with the MB Quart Discus Monoblock Marine Amplifier, engineered for powerful performance and rugged durability in harsh environments. Delivering up to 600 watts of clean, efficient power at 2 ohms of amp power and 350 watts at 4 ohms of amp power, this amplifier is built to handle life on the water while providing exceptional sound clarity and control. Its potted internal components add an extra layer of protection against moisture, vibration, and corrosion, making it ideal for boats, UTVs, and other outdoor applications.

At the heart of the system is a highly efficient Class D topology, allowing the amplifier to generate significant power while maintaining a compact design and minimizing strain on your electrical system. The premium MOSFET Pulse Width Modulation power supply ensures consistent output, while MB Quart’s FLUID-FET output devices deliver clean, high-quality sound that rivals high-end home audio systems.

The Q-Stasis preamplifier stage maximizes low-voltage input signals with minimal distortion, preserving audio detail and clarity. Variable electronic crossovers and onboard sound contouring features, including bass boost and adjustable input sensitivity, allow you to fine-tune your system for optimal performance. Includes a wired bass remote that allows adjustments to bass frequencies to be made from the control mounted anywhere in the vehicle

Built for convenience and reliability, the amplifier features waterproof connectors and prewired RCA inputs for secure, corrosion-resistant connections. Top-mounted controls are sealed for protection yet easily accessible for quick adjustments. LED system diagnostics provide real-time feedback for overload and short protection, ensuring your system stays safe and performing at its best.

Features

• MB Quart Discus monoblock amp delivers 600W @ 2 ohm and 350W @ 4 ohm—ideal marine amp, motorcycle amp, and UTV audio system upgrade
• Fully sealed, waterproof, and dustproof design built for boats, ATVs, UTVs, motorcycles, and outdoor audio systems in harsh environments
• Small footprint amplifier is perfect for tight installs where space is limited
• Advanced Class D technology produces powerful, clean sound while reducing heat and electrical load for tight installs and powersports applications
• Variable high/low pass crossover (15Hz–300Hz), adjustable input sensitivity (0.2V–9V), waterproof connections, and LED protection indicators for reliable performance
• Includes a wired bass remote that allows adjustments to bass frequencies to be made from the control mounted anywhere in the vehicle
• Color: Black
• Dimensions (L x W x H): 23.25 x 6.0 x 4.0 inches
• Weight: 6.0 pounds
  

What our Experts Think

• Deep, powerful bass performance: The MB Quart Discus Monoblock Marine Amplifier 431773 delivers 600 watts of Class D amplification, making it an excellent choice for powering marine subwoofers with strong, controlled low-frequency output.
• Built for outdoor adventures: Its sealed, marine-ready construction helps protect against moisture, dust, vibration, and harsh conditions found in boats, ATVs, UTVs, and other powersports environments.
• Efficient power delivery: The Class D design provides high output while helping reduce heat and electrical strain, ideal for compact installations where space matters.
• Simple tuning access: Top-mounted controls and adjustable sound settings make it easy to fine-tune bass levels and optimize your audio system after installation.
• Expert recommendation: A strong upgrade for customers seeking reliable marine bass power, compact design, and durable performance in challenging environments.

Q&A

Maintenance Tips

• Rinse away salt, dirt, and moisture buildup regularly to help prevent corrosion in marine environments.
• Keep the amplifier’s sealed controls and waterproof connections clean and free from debris.
• Check power, ground, and speaker connections periodically for looseness or corrosion.
• Inspect mounting hardware to ensure the amplifier stays secure during vibration and rough conditions.
• Avoid covering ventilation areas and allow proper airflow to prevent overheating.
• Use a soft, dry cloth for cleaning; avoid abrasive cleaners or chemicals.
• Monitor LED protection indicators and address overload or short-circuit warnings promptly.
• Adjust gain and bass controls carefully to prevent distortion and protect connected subwoofers.
• Store or cover the unit during long periods of non-use to protect against harsh weather exposure.