{"product_id":"ds18-nxl-m4-hydro-4-channel-full-range-class-d-marine-powersports-amplifier-4-x-150w-rms-at-4-ohms-ip55","title":"DS18 NXL-M4 HYDRO 4-Channel Full-Range Class D Marine \u0026 Powersports Amplifier, 4 x 150W RMS at 4 ohms, IP55","description":"\u003cp\u003eThe DS18 NXL-M4 HYDRO amplifier is designed to drive marine and powersports speakers 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.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHigh-efficiency Class D output stage supports installation in constrained marine\/powersports compartments.\u003c\/li\u003e\n\u003cli\u003e4 x 150W RMS at 4 ohms; individual load-specific ratings are listed below.\u003c\/li\u003e\n\u003cli\u003eAdjustable filtering supports speaker protection and system tuning.\u003c\/li\u003e\n\u003cli\u003eIP55 water-resistance classification; corrosion-conscious electrical installation remains essential.\u003c\/li\u003e\n\u003cli\u003eIntegrated power, protect and clipping status indication and protective circuitry.\u003c\/li\u003e\n\u003cli\u003eStereo operation and supported bridged configuration provide flexible choices for full-range speaker systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier topology:\u003c\/strong\u003e Class D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel arrangement:\u003c\/strong\u003e 4-Channel Full-Range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress protection:\u003c\/strong\u003e IPX5 (splash-resistant; DS18 also references IP55)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS output at 4 ohms:\u003c\/strong\u003e 4 x 150W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS output at 2 ohms:\u003c\/strong\u003e 4 x 230W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged output at 4 ohms:\u003c\/strong\u003e 2 x 440W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak power rating:\u003c\/strong\u003e 1800W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 20Hz–20kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-noise ratio:\u003c\/strong\u003e \u0026gt;90dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel separation:\u003c\/strong\u003e \u0026gt;55dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD:\u003c\/strong\u003e \u0026lt;0.15%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-level input sensitivity:\u003c\/strong\u003e 0.2–6V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-level inputs:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrossover:\u003c\/strong\u003e Selectable high-pass, low-pass or full-range; 40Hz–2kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass boost:\u003c\/strong\u003e 0–12dB at approximately 45Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum load:\u003c\/strong\u003e 2 ohms stereo \/ 4 ohms bridged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended fuse specification:\u003c\/strong\u003e 2 x 35A (70A total)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower terminals:\u003c\/strong\u003e 4 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 9.6 x 4.5 x 1.7 in. (245 x 116 x 43mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation \u0026amp; System Integration\u003c\/h3\u003e\u003cp\u003eProvide 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.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eUse 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.\u003c\/p\u003e","brand":"DS18","offers":[{"title":"Default Title","offer_id":67902246846552,"sku":"CED-DS18NXL-M4","price":474.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/8160\/files\/4314566.jpg?v=1792701365","url":"https:\/\/shipsound.com\/products\/ds18-nxl-m4-hydro-4-channel-full-range-class-d-marine-powersports-amplifier-4-x-150w-rms-at-4-ohms-ip55","provider":"ShipSound.com","version":"1.0","type":"link"}