Electro-Voice EVID C10.1 10" high-power ceiling subwoofers with extended bass response down to 45Hz. Feature a high-excursion 10" driver, integrated ported enclosure, low-pass network with overload protection, selectable 70V/100V or 8-ohm operation, and front baffle tap adjustment. Includes mounting rings and tile bridges for easy installation. SOLD IN PAIRS