The C10.1 packs a large 10" subwoofer in a tuned high performance enclosure to give amazing low frequency performance down to 45Hz! The 10.1 is one of the only quick mount ceiling TRUE subwoofers available on the market. Flexible installation, and powerful low-end performance make this an ideal companion to any EVID model. Features a secure 4-point mounting system which makes installations fast and easy. Comes complete with mounting support ring and tile rails. No additional accessories needed for most installations.