Sonance Pro Series PS-C43RT In-Ceiling Speaker With Sealed EnclosureThe Sonance Professional Series PS C43RT is a high performance 4 inch in ceiling speaker designed for commercial distributed audio installations that demand both clean aesthetics and accurate sound. A high excursion 4 inch polypropylene woofer delivers effortless low bass extension even at elevated volumes, while a pivoting chambered 1 inch soft dome tweeter can be aimed to ensure consistent coverage when ceiling geometry forces compromised speaker