The DS1375 contains a five inch diameter speaker. The compact enclosure includes a flame-retardant, acoustical insert to eliminate standing waves and metallic resonance. Dynasound’s DS1375 sound masking speaker is designed for quick and easy installation into suspended acoustical tile or drywall ceilings. The loudspeaker assembly offers a clean appearance with no exposed controls from below. The DS1375 provides uniform dispersion and is well suited for paging and music signals and sound masking signals.