Yamaha Ceiling speaker system (NS-IC800)The NS IC800 in ceiling speaker system is easy to install and features a moisture resistant 8 6 1 2 PP mica cone woofer for a superior mid low sound. A 1 soft dome swivel tweeter produces pristine high frequencies. With a grain finished acoustic baffle and spiral pattern for optimized sound dispersion, this slim profile design is suitable for both in ceiling and in wall mounting. A sealed back cover prevents dust and moisture from affecting the