GBR250.4D

Compact Power for Cars, Boats & Powersports

The Gravity GBR250.4D True 360-Watt RMS Micro Digital Amplifier delivers powerful full-range sound in an ultra-compact chassis designed for tight installation spaces. Engineered for motorcycles, ATVs, RVs, boats, cars, and marine audio systems, this 4-channel amplifier provides clean, efficient power while maintaining a small footprint that fits almost anywhere. Its digital Class-D design ensures high efficiency with reduced heat generation, making it ideal for demanding environments and long listening sessions.

Whether upgrading factory audio or building a custom system, the GBR250.4D offers dependable performance with RCA stereo inputs for easy integration into aftermarket head units and audio processors. The compact design allows hidden mounting under seats, inside fairings, storage compartments, or marine consoles without sacrificing audio quality or output.

Efficient Class-D Technology with Full-Range Performance

Built with advanced digital amplifier technology, the Gravity GBR250.4D produces crisp highs, detailed mids, and strong bass response while consuming less power than traditional amplifier designs. Its 4-channel configuration supports front and rear speaker setups or bridged configurations for enhanced flexibility in custom audio installations.

The amplifier’s efficient circuitry minimizes distortion and delivers stable performance across a wide frequency range, making it suitable for marine systems, motorcycle audio upgrades, off-road vehicles, and compact car installations. Its durable construction is designed to withstand vibration and challenging environments commonly found in powersports and marine applications.

Ultra-Compact Design for Versatile Installation

The Gravity GBR250.4D Micro Amplifier is specifically engineered for users who need serious audio performance without bulky equipment. The slim and lightweight chassis makes installation easy in confined spaces while maintaining reliable heat management and long-term durability. Ideal for stealth installations, this amplifier can be mounted in motorcycles, boats, RV cabinets, under seats, or compact vehicle interiors.

With RCA stereo inputs and full-range amplification capability, the GBR250.4D works seamlessly with a variety of audio systems and speaker configurations. Its combination of compact size, efficient operation, and strong RMS output makes it a versatile solution for enhancing sound quality in virtually any mobile audio setup.

Highlights

• True 360-watt RMS digital 4-channel full-range amplifier
• Ultra-compact micro chassis for tight installation spaces
• Efficient Class-D amplifier technology for reduced heat
• Ideal for motorcycle, ATV, RV, marine, boat, and car audio
• Delivers clean and powerful full-range sound reproduction
• RCA stereo input for simple aftermarket integration
• Supports multi-speaker audio system configurations
• Lightweight design for stealth or hidden installations
• Durable construction designed for mobile environments
• Stable performance with low distortion output
• Great for custom audio upgrades and compact builds
• Flexible mounting options for powersports and marine use
• Efficient power handling for extended listening sessions
• Suitable for front and rear speaker amplification setups

Package Contains

• Gravity GBR250.4D 4-Channel Digital Amplifier
• Mounting Hardware
• User Manual