DS18 NXL-X1200.5D HYDRO 5-Channel Full-Range & Subwoofer Class D Marine & Powersports Amplifier, 4 x 150W RMS at 4 ohms + 600W RMS subwoofer at 2 ohms, IP67

The DS18 NXL-X1200.5D HYDRO amplifier is designed to drive full-range speakers and a dedicated subwoofer with efficient Class D amplification. Its IP67-rated enclosure and variable audio adjustments make it suitable for boat, UTV, and off-road installations while preserving the distinct power specifications at each load impedance.

Key Features

• High-efficiency Class D output stage supports installation in constrained marine/powersports compartments.
• 4 x 150W RMS at 4 ohms + 600W RMS subwoofer at 2 ohms; individual load-specific ratings are listed below.
• Adjustable filtering supports speaker protection and system tuning.
• IP67 water-resistance classification; corrosion-conscious electrical installation remains essential.
• Integrated power, protect and clipping status indication and protective circuitry.
• Four full-range channels and a separate subwoofer channel allow speakers and bass to be powered from one amplifier chassis.

Technical Specifications

• Amplifier topology: Class D
• Channel arrangement: 5-Channel Full-Range & Subwoofer
• Ingress protection: IP67
• RMS output at 4 ohms: 4 x 150W + 1 x 350W subwoofer
• RMS output at 2 ohms: 4 x 200W + 1 x 600W subwoofer
• Bridged output at 4 ohms: 2 x 400W for full-range pairs
• Peak power rating: 2800W
• Full-range crossover: HPF/FULL/LPF, 40Hz–2kHz
• Subwoofer low-pass: 50–250Hz
• Subwoofer bass boost: 0–18dB at 42Hz
• Subwoofer infrasonic filter: 10–55Hz
• Frequency response (published): 10–250Hz
• Signal-to-noise ratio: >85dB
• THD: <0.05%
• Channel separation: 60dB
• Input range: 200mV–5V
• Minimum impedance: 2 ohms stereo / 4 ohms bridge / 2 ohms subwoofer

Installation & System Integration

Provide a dedicated fused battery feed sized to the amplifier power demand, a short solid ground, sufficient mounting clearance and serviceable signal wiring. Connect each channel only to a supported speaker impedance. Bridged ratings require the specified 4-ohm load. Tune gain and active filters with the system playing cleanly rather than using gain as a volume control. Keep wiring, terminals and mounting points protected from saltwater and prolonged water immersion.

Compatibility

Use with 12V marine/powersports audio systems and speakers wired to meet the manufacturer-listed minimum impedances. Monoblock models drive subwoofer loads; multi-channel full-range/subwoofer models provide independent speaker and bass outputs.