A very popular single speaker for home theaters and whole house audio. The ICE640TT in-ceiling speaker includes a 6 1/2-Inch polypropylene woofer with butyl rubber surround, dual 3/4-Inch silk dome tweeters, and 150W power handling. This single in-ceiling speaker uses dual 16 ohm voice coils; switch for 16 ohm stereo operation or 8 ohm mono bridged setup.