The CS800DTFL is a 2-way ceiling loudspeaker that incorporates high tech woofer materials with a butyl rubber surround and the state-of the-art dual dome diffraction-less Ferrofluid cooled tweeters. The tweeters are in a preset angled configuration to prevent noise canceling. The DT provides stereo sound from one speaker. This revolutionary combination provides superior and more natural sound for both foreground and background applications. The FastLoc™ grill is a patent pending feature found only at Current Audio. Our design has allowed for the smallest exposed plastic bezel in the industry, truly making it disappear into the mounting surface. The FastLoc™ grill's unique patent pending mechanism allows for a quick installation and removal of the grill while securely fastening it in place to all types of mounting surfaces. Due to the unique design the grill will conform to uneven surfaces including popcorn, heavy textured and uneven ceilings. While our competitors have chosen to utilize magnets in their designs thus requiring the use of a steel grill that will rust our design allows us to use corrosion and rust resistant aluminum. The Infinite Baffle design makes it the ideal choice for typical applications in open beam attic or enclosed ceilings.