Introducing our high-end marine amplifiers, meticulously designed for motorcycles, boats, ATVs, automobiles, and off-road vehicles. These amplifiers are exceptionally powerful and extremely reliable, engineered to deliver outstanding performance in the most demanding environments. Built with IPX67-rated waterproof multi-layer circuit boards, these amplifiers are perfect for marine applications, ensuring durability and longevity. Enjoy noise-free operation with balanced differential inputs, and experience superior sound quality with full-range digital Class D technology and Direct FET power MOSFET output stage. Fine-tune your audio system with 12dB per octave adjustable crossovers and phase control, providing precise system tuning. The selectable 3-option Auto Turn-On Mode circuit is designed to work seamlessly with any OEM head unit, simplifying installation and enhancing versatility. Upgrade your audio experience with our high-end marine amplifiers. Whether you're on the water, off-road, or cruising the highway, these amplifiers deliver the power, reliability, and sound quality you demand. Embrace the ultimate in audio performance and rugged durability today. Specifications Power Rating (RMS) 200W x 4 @ 2Ω 125W x 4 @ 4Ω 400W x 2CH @ 4Ω (Bridged) Input Sensitivity: 0.2-10 Volt Crossover Filter : 40-400Hz, 12dB Per Octave Slope Frequency Response: 10-33KHz Selectable X-Over: LPF / FULL / HPF Selectable 2CH / 4CH Input Modes Dimensions (Length x Width x Height) 11.76” x 4.33” x 1.73” (298.6mm x 110mm x 44.0mm) RCA Input & Line-Out, Speaker, Power Supply Harness Kits Included