Graphite is one of Proficient's favorite woofer materials, and it's part of what makes the C661 so good. The C661's graphite woofer and aluminum dome tweeter are mounted at a 15-degree angle, making this speaker ideal for the front left, center and right channels in a home theater systems-"and even for the surround channels, too! Small never sounded so sweet. The great sound of a 6 1/2-inch graphite woofer makes the C661 Proficient's best-sounding compact ceiling LCR speaker. The ultra-stiff woofer cone contributes to the immense power handling, the deep bass and the natural-sounding midrange. A 1-inch silk dome tweeter blends perfectly with the woofer, thanks to careful tweaking from Proficient's team of dedicated audiophiles. We set the C661's woofer and tweeter at a 15-degree angle, so you can mount the speaker above a TV and point it at the listeners. You get sound imaging very similar to what you'd get with a conventional home theater system. The 92 dB sensitivity and 125-watt power handling assure that the C661 will work great in any system. Includes Thin-Bezel Grilles held by Neo Magnets.