Sonance Pro Series PS-C83RWT In-Ceiling Subwoofer With Included Tile BridgeThe Sonance Professional Series PS C83RWT is a dedicated 8 inch in ceiling subwoofer module designed to augment Pro Series full range speakers with effortless, impactful low bass extension at any sound pressure level. An ultra high excursion 8 inch polypropylene woofer delivers the deep bass that small ceiling speakers cannot reach on their own useful in restaurants, fitness studios, retail, and hospitality where program material demands more low end