Take your marine audio system to the next level with the MB Quart Discus 4 Channel Marine Amplifier, engineered for powerful performance and rugged durability in harsh environments. Delivering up to 520 watts of clean, efficient power at 2 ohms of amp power and 360 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.
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.
- MB Quart Discus 4 channel amp delivers 4x130W @ 2 ohm, 4x90W @ 4 ohm, or 2x260W bridged @ 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
- Color: Black
- Dimensions (L x W x H): 21.75 x 6.0 x 4.0 inches
- Weight: 6.1 pounds
- Manufacturer warranty: 1-year Warranty
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
What size is the amplifier?
The amplifier measures 21.75 x 6.0 x 4.0 inches (length x width x height). Use these measurements to plan mounting, placement, or transport for your setup.
What is the amplifier used for?
The amplifier is used for live sound, DJ setups, home audio, or event production, depending on configuration. It connects with a typical audio chain — source, mixer or controller, and amplification — to produce sound for the intended environment.
Does the amplifier come with a warranty?
Yes. The amplifier is backed by 1-year manufacturer warranty. Coverage details and claim procedures are provided by the manufacturer; retain your order receipt as proof of purchase if you ever need to file a claim.
Who makes the amplifier?
The amplifier is made by MB Quart. MB Quart produces this item as part of its lineup, and product details such as specifications, included accessories, and warranty terms are set by the brand.
How much does the amplifier weigh?
The amplifier weighs approximately 6.1 pounds. Use this figure to plan transport, rigging, or mounting requirements for your setup.
What should I know about the amplifier before buying?
The amplifier from MB Quart brings together a few practical features worth highlighting:
- 1-year manufacturer warranty
Review the product description and specifications to confirm it matches your specific needs before placing your order.
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