The newly designed M0 speakers feature weatherproofing technology specific for use in marine watercraft and off-road vehicle audio systems. The 100% UV stable frame combined with an encapsulated motor assembly, and marine grade connectors yield a driver that will not discolor or corrode in the harsh marine environment. Purpose built to play high quality sound in the outdoors, the M0 speakers deliver superb low end and mid-range frequency reproduction via an injection molded mineral filled polypropylene cone body, santoprene surround, and RockfordÂ’s patented VAST (vertical attach surround technique) Technology to increase the effective radiating cone area. By pairing this with an efficient, grill integrated, tweeter the speakersÂ’ sonic signature is rounded out by smooth crystal-clear high frequencies.