Pure Resonance Audio SD4 SuperDispersion Ceiling Speaker Array

Pure Resonance Audio SD4 is a SuperDispersion ceiling speaker array built for wider, more even paging and music coverage with fewer speakers in commercial spaces.

The Pure Resonance Audio SD4 is designed for commercial installations that need smoother overhead audio without filling the ceiling with multiple small speakers. Sold individually, this ceiling speaker array uses a four-driver design with a 360° by 180° dispersion pattern to help spread sound more evenly across the room for clearer paging and more consistent background music. With 70V transformer taps, an 8 ohm bypass, and a lay-in drop-ceiling format, it is a strong fit for schools, offices, retail stores, restaurants, houses of worship, and public facilities.

Why installers choose this ceiling speaker array

• SuperDispersion design helps reduce hot spots and dead zones across the room
• Four-driver array supports clearer voice paging and more even music coverage
• 70V transformer taps from 4W to 64W make zone planning and volume matching easier
• 8 ohm bypass adds flexibility for low-impedance amplifier systems
• Lay-in format speeds up installation in standard drop-ceiling grids
• Can help reduce total speaker count, wiring, and ceiling labor in some layouts

Best use cases

• School hallways, classrooms, and university buildings needing clear paging
• Retail stores and restaurants that want smoother background music coverage
• Office spaces, lobbies, and public waiting areas with drop ceilings
• Houses of worship and government facilities using distributed audio
• Commercial installs where fewer speakers and cleaner ceiling layouts are preferred

Recommended with this product

• Browse 70V amplifiers
• Shop commercial amplifiers
• Add speaker wire for commercial installs

Quick guidance

This is a strong choice if you want a commercial ceiling speaker array that covers more area with fewer units than a typical ceiling speaker layout. It works especially well in drop-ceiling spaces where speech intelligibility, even room coverage, and simpler installation all matter. If you want help matching this speaker with the right amplifier or coverage plan, contact us.

1. Is the Pure Resonance Audio SD4 sold individually or as a pair?
This ceiling speaker array is sold individually, which makes it easier to design the system based on the room size and coverage requirements.

2. Can the SD4 be used in both 70V and low-impedance systems?
Yes. It includes 70V transformer taps from 4W to 64W and also offers an 8 ohm bypass for low-impedance amplifier setups.

3. What type of installation is the SD4 designed for?
The SD4 is designed for lay-in installation in standard 2x2 or 2x4 drop-ceiling grids, which helps speed up installation and keeps the finished ceiling looking clean and professional.