The DS1357 contains a 5.25-inch diameter speaker mounted on axis. The compact enclosure includes a convoluted, flame-retardant, acoustical insert to further reduce standing waves and metallic resonance. Dynasound’s DS1357 sound masking speaker is designed for quick and easy installation into open structure architecture and above suspended ceilings. When suspended, the loudspeaker assembly offers a clean appearance with no exposed controls or wiring from below. The DS1357 provides uniform dispersion and is well suited for sound masking, paging and music signals.