TOA F-1522SC 4-Inch Ceiling SpeakerThe F 1522SC ceiling mounted speaker covers an extremely wide area and can be used for 25, 70 and 100 V line applications. Well balanced sound can be heard uniformly at any location. This speaker has a rear open type speaker system employing a speaker element covering a full frequency range. The wide dispersion flush mount ceiling speaker design employs unique acoustic construction to realize a wide area of coverage. Uniform sound output levels are