The PC-580RUÂ and PC-580RVU are designed to fill the need for a high-performance/low-cost ceiling speaker for paging and notification applications. Especially where retrofit of speakers in large facilities dictate that a common speaker template is used, eliminating the need for adapting existing ceiling cutouts. The PC-580RU and PC-580RVU (along with the HY-BC580U Back can) meet UL requirements for speakers used in emergency signaling and notification applications.