MTX Audio's Thunder Marine is the new number one choice for marine audio with a complete line of amplifiers, speakers, and subwoofers. Unlike other marine product that is just a white version of car stuff, Thunder Marine is designed for the harshest marine environment. Conformal board coatings help to prevent corrosion, and thermal rail regulation helps to control amplifier temperature. Sealed covers keep amplifier controls and speaker terminals dry. Impact resistant grilles protect the speakers while still looking great.