The Bogen HFSF1 Small-Footprint Ceiling Speaker delivers superior sound in a very compact enclosure. The speaker is unobtrusive at only 7-1/4” in diameter, and mounts easily in all types of ceilings including existing hard-surface types and suspended ceilings. The HFSF1's low-distortion, coaxial-design speaker, coupled with a computer-matched venting system, delivers superb fidelity for music as well as high intelligibility for voice reinforcement. It provides the perfect solution for environments that require the highest-quality sound with minimal visual impact.