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Description
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Features
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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.
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%
