Four channels to grow with This 4-channel amp will totally rock your boat The Wet Sounds HTX4 4-channel marine amplifier packs a lot of punch into a compact package, with the power and versatility you need to get the sound you crave. This Hydro-Tech(tm) X Series amp delivers 100 watts RMS per channel in 4-channel mode, or you can run it in 2-channel mode to deliver 300 watts RMS each to a pair of subwoofers. Its small size means lots of installation options, while its Class D design means it'll stay cool wherever you place it. With both high- and low-pass filters, you'll be able to get the best possible sound from your Wet Sounds marine speakers. Made to thrive on your boat Designed by boaters for boaters, Wet Sounds Hydro-Tech(tm) X (HTX) amplifiers are made to survive and thrive in the often-harsh marine environment. A conformal-coated circuit board, a sealed, salt-water resistant heat sink, and stainless steel hardware ensure that your amp will stand up to salt, spray, high temperatures, and high volume levels for seasons to come.