The all black in-ceiling surround speakers are designed specifically for in-ceiling home theaters. The GHT-CSUR-G feature a 6.5” glass fiber woofer carbon fiber woofer creating a more polished high frequency roll-off, reduced beaming and exceeding mid frequencies. Dual 0.75" carbon fiber tweeters on proprietary rotating bridge improve sound dispersion by directing crisp, clear, and accurate higher frequency sounds to fit any room. Convenient treble and bass equalization adjustments make precision tuning effortless. All ghost series speakers come with a patented 2-millimeter reveal magnetic frameless grill. The rimless cloth grill attaches easily and covers the lip. The GHT-CSUR-G comes with two interchangeable black and white ghost grills, making the speaker virtually disappear into the installation environment. Making the speaker a true labor and time saver.