Marine grade protection - built to withstand extreme marine weather conditions and salt spray and never miss a beat. Ipx standard water resistant so you can confidently enjoy all of your music with a high-power system Low noise preamplifier circuit - Maximize the low voltage power without creating any electric distortion between the amplifier and the source unit. Avoid hearing anything besides your favorite tunes. Rca inputs - These prewired inputs are connected directly to the PC board for additional protection. Always leave connector cover closed on RCA jacks that are not currently being used. Temperature control - The nautical white glossy epoxy finish helps to reject heat to the surface of the amplifier. This effectively allows a longer lifespan and more efficient operation of your amp. Automatically transferring the heat Cool off properly. High Tech output device - fluid FETs are mb quarts devices that are painstakingly selected for their ability to efficiently produce power and mimic the sound quality of the highest end home amplifiers. Enjoy the highest quality audio wherever you are.