Soundstream PSA1.4000D Monoblock Waterproof Marine Amplifier – 4000W Max Class D Amp | Boat, ATV, UTV, Motorcycle & Powersports Audio System | Marine-Grade Performance

Upgrade your marine and powersports sound system with the Soundstream Monoblock Waterproof Marine Amplifier—engineered for extreme durability and high-performance sound in any environment. Featuring up to 4000W Max output and efficient Class D technology, this amp powers your speakers and subwoofers with crystal-clear sound while maintaining low heat and power consumption. Designed with IP66 waterproof protection, corrosion-resistant materials, and sealed circuitry, it’s built to handle saltwater spray, mud, UV exposure, and rough terrain without compromising performance. Perfect for boats, ATVs, UTVs, jet skis, motorcycles, and custom outdoor audio setups, this compact marine amplifier gives you the freedom to bring powerful, reliable sound anywhere your adventures take you. Take your sound to the next level with Soundstream—engineered for the outdoors, built to last.

• High-Power Output: Delivers up to 4000 Watts Max of clean, distortion-free power in a compact monoblock design—perfect for driving subwoofers and full marine speaker systems. With a max output of 4,000 watts and RMS performance up to 1,300W @ 1Ω, the PSA1.4000D is designed to drive your subwoofer with clean, authoritative power.
• Marine-Grade Durability: Built with IP66 waterproof protection, sealed circuit boards, and corrosion-resistant components to withstand harsh marine and outdoor environments. Its IP66-rated housing, military-grade PCB, and PWM MOSFET power supply ensure reliable operation in wet, muddy, and high-vibration environments — from open water to off-road.
• Medium Class D Efficiency: Advanced Class D technology ensures cooler operation, lower power draw, and maximum sound output for boats, ATVs, UTVs, and various applications. Dial in your bass response with fully variable 12dB low-pass and subsonic crossovers, plus an adjustable bass boost to enhance lower-octave impact.
• Versatile Installation: Slim, space-saving chassis with marine-grade terminals makes installation simple in tight spaces while guaranteeing long-lasting connections. Purpose-built for powersport, marine, and motorcycle audio systems, this 4-ohm stable Class D monoblock amplifier delivers massive low-end performance in a durable, waterproof chassis ready for the elements.
• All-Weather Performance: Designed for salt, spray, mud, and UV resistance, making it ideal for wakeboard towers, jet skis, off-road vehicles, and outdoor sound systems. Built for the extreme, the Soundstream PSA1.4000D is a compact powerhouse engineered to push serious bass in the toughest conditions.