DESC: Overhead sound has never sounded better The least obtrusive of all installed systems, in-ceiling speakers are perhaps the most difficult to engineer. Boston in-ceiling products use innovative materials and advanced technologies to deliver full-range sound to the only place it really matters-your ears. A high-value, high-performance 3-way in-ceiling speaker for installed music and Hidden TheaterTM systems, the HSi 4830 is built around an 8-inch woofer for the authoritative bass response lacking many in-ceiling systems. Designed for stunning sound and ease of installation, HSi 4830 in-ceiling loudspeaker expands the realm of quality sound to create an audio system that pleases even the most critical ears.