The DS18 Hydro Amplifier Series rugged, compact construction, yet sleek design, SMC (surface mount component) technology, provide its users with trouble free, waterproof (IPX6 Level), amazing sound quality. Engineered for all elements, these amplifiers are a great addition to your marine life including jet skis, boat, etc. as well as a great fit for Jeeps, UTV, ATV Motorsports! The HYDRO full range amplifiers come in 1, 2, 4, 5 channel stereo options. Also equipped with a removable face plate for setting controls, stainless hardware, and UV/Salt Fog Protection.