J&M Corporation HRRK-6712TW-XXR Rocker Xxr Series 6.71 Fairing Speaker Kit Lightweight waterproof one-piece woven-fiber driver cone with super-rigid metal basket design High-density lite-weight neodymium magnet structure High efficiency vented voice-coil for improved cooling when operating at high volume levels for extended periods Custom speaker grills with high-output tweeters for crystal clear sound at highway speeds