DS18 NXL-M5 HYDRO 5-Channel Full-Range & Subwoofer Class D Marine & Powersports Amplifier, 4 x 150W RMS at 4 ohms + 1 x 600W RMS at 2 ohms, IP55

The DS18 NXL-M5 HYDRO amplifier is designed to drive full-range speakers and a dedicated subwoofer with efficient Class D amplification. Its IP55-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 + 1 x 600W RMS at 2 ohms; individual load-specific ratings are listed below.
• Adjustable filtering supports speaker protection and system tuning.
• IP55 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: IPX5 (splash-resistant; DS18 also references IP55)
• RMS output at 4 ohms: 4 x 150W + 1 x 300W subwoofer
• RMS output at 2 ohms: 4 x 230W + 1 x 600W subwoofer
• Bridged output at 4 ohms: 2 x 440W for full-range channel pairs
• Peak power rating: 3600W
• Frequency response: 20Hz–20kHz
• Signal-to-noise ratio: >90dB
• THD: <0.15%
• Low-level input sensitivity: 0.2–6V
• High-level input: Yes
• Full-range crossover: HPF/LPF/FULL, 40Hz–2kHz
• Subwoofer low-pass range: 32–320Hz
• Subwoofer bass boost: 0–12dB around 45Hz
• Subwoofer phase: 0–180 degrees
• Minimum load: 2 ohms stereo / 4 ohms bridge / 2 ohms sub
• Fuse specification: 3 x 40A (120A total)
• Power terminals: 4 AWG

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.