Pure Resonance Audio SD4 SuperDispersion Ceiling Speaker Array 70V 160W

The Pure Resonance Audio SD4 SuperDispersion® omnidirectional drop tile ceiling speaker array provides 360° of powerful hemispheric audio coverage, allowing a single unit to cover up to 900 square feet. This high-performance array features four 6.5" aluminum drivers designed to replace multiple conventional ceiling speakers, significantly reducing installation time and costs for commercial environments. The truncated pyramid design eliminates coverage voids, ensuring full-bodied music reproduction and clear paging for classrooms, retail stores, and restaurants.

Built for long-term reliability, the SD4 is constructed from fire-resistant ABS with a low-profile 2.8" plenum backbox that fits easily into standard 2x2 or 2x4 drop-ceiling grids. The four matched aluminum coaxial speakers utilize titanium dome tweeters and butyl rubber surrounds to resist environmental deterioration from moisture and aging. Integrated bass-reflex ports act as mechanical low-pass filters, increasing power handling and improving low-frequency output while maintaining driver stability and reducing distortion.

This versatile 70V solution includes a built-in transformer with selectable taps ranging from 4W to 64W, as well as an 8-ohm bypass for compatibility with various professional audio amplifiers. Installation is streamlined and secure, requiring only minutes to drop the unit into a ceiling grid and attach the included safety cable kit. Whether used for foreground music or public address announcements, the SD4 delivers professional-grade sound quality in a durable, easy-to-deploy package.