The C625TT gives you stereo sound where mounting two speakers is impractical, such as in a hallway or bathroom. Its 6½-inch polypropylene woofer has dual voice coils so it can reproduce left and right stereo channels. Dual 1/2" hard dome tweeters handle the high frequencies. Careful tuning from our team of devoted audio enthusiast/engineers makes the C625TT a sweet-sounding little speaker. You can use the C625TT with any amplifier, thanks to its high 92 dB sensitivity. A typical speaker requires three times as much power! It's easy to install, too, thanks to a sturdy dogleg mounting system. All of our 6½-inch ceiling speakers use the same mounting template so you never have to worry about cutting the wrong size hole. Includes Thin-Bezel Grilles held by Neo Magnets.