4-Channel Full Range Class D Waterproof Amplifier IPX67 Marine Rated

Take your outdoor audio system to the next level with the Diamond Audio 4-Channel Full Range Class D Waterproof Amplifier, engineered for marine, motorcycle, ATV, UTV, and off-road applications. Built to perform in the harshest environments, this IPX67-rated waterproof amplifier delivers powerful, clean sound with exceptional durability and reliability.

Designed with advanced full-range Class D digital technology, the Diamond Audio 4-channel marine amplifier provides impressive output with 125W x 4 at 4 ohms, 200W x 4 at 2 ohms, and 400W x 2 bridged at 4 ohms. This makes it ideal for powering full-range speakers or bridging channels for higher output applications, delivering clear highs, detailed mids, and dynamic performance across the entire frequency range.

Engineered for rugged use, the IPX67 waterproof amplifier features conformal-coated multi-layer circuit boards, protecting internal components from water, dust, and environmental exposure. Whether installed in a boat, motorcycle, or off-road vehicle, this marine-grade amplifier ensures long-lasting performance in extreme conditions.

The Diamond Audio 4-channel waterproof amplifier also includes balanced differential inputs for noise-free signal transmission and a wide frequency response (10Hz–33kHz) for accurate sound reproduction. With variable crossovers (40Hz–400Hz) and selectable LPF / FULL / HPF modes, this amplifier allows precise system tuning to match your audio setup.

Installation is simple with selectable 2-channel and 4-channel input modes, along with REM, VOX, and DC turn-on options, ensuring compatibility with factory and aftermarket head units. Additional features such as power and protection LED indicators and built-in short circuit, thermal, and voltage protection provide reliable operation and system monitoring.

Key Features

• 4-channel full range Class D waterproof amplifier
• IPX67-rated for marine and outdoor applications
• 125W x 4 @ 4Ω / 200W x 4 @ 2Ω / 400W x 2 bridged @ 4Ω
• Balanced differential inputs for clean signal
• Selectable LPF / FULL / HPF crossover modes
• 2CH / 4CH input flexibility
• Short circuit, thermal, and voltage protection
• Compact, durable design for easy installation
• LED power and protection indicators

The Diamond Audio 4-Channel Waterproof Amplifier delivers powerful, reliable, and crystal-clear sound, making it the perfect solution for marine and powersports audio systems that demand performance and durability.