Soundstream PSA1.4000D IP66 Waterproof Monoblock Amplifier for Powersport, Marine & Motorcycle – 4,000W Max

Built for the extreme, the Soundstream PSA1.4000D is a compact powerhouse engineered to push serious bass in the toughest conditions. Purpose-built for powersport, marine, and motorcycle audio systems, this 1-ohm stable Class D monoblock amplifier delivers massive low-end performance in a durable, waterproof chassis ready for the elements.

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. 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.

Dial in your bass response with fully variable 12dB low-pass and subsonic crossovers, plus an adjustable bass boost to enhance lower-octave impact. Advanced protection circuitry and input sensitivity up to 3V make integration smooth, safe, and system-friendly.

General Features:

• Max Power Output: 4,000W
• RMS Power @ 2Ω: 900W x 1
• RMS Power @ 1Ω: 1,300W x 1 (Monoblock)
• IP66 Waterproof Certified – Built for Harsh Environments
• 1-Ohm Stable Class D Amplifier for Subwoofer Applications
• Military-Grade PCB with PWM MOSFET Power Supply
• Direct Short, Thermal, & Overload Circuit Protection
• Low-Level RCA Inputs (200mV – 3V)
• Variable Low Pass Crossover: 30Hz – 180Hz (12dB)
• Variable Subsonic Filter: OFF – 50Hz (12dB)
• Variable Bass Boost: 0 – 12dB (12dB/Octave)
• THD: <0.05%

Warning:
This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.