Key features

• •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.