Using Uni-Q technology for even sound distribution in the listening room, cast aluminum enclosures for quality feel and superior acoustic performance, this Kef KHT 1005 is a 2 way speaker system with a frequency response of 120 Hz - 30 kHz and 100 Watt peak power handling. It develops a nominal impedance of 8 ohm and a 87dB sensitivity. You can mount this speaker system in ceiling, in wall, floor standing or on a bookshelf. Its dimensions are 6.5 x 4.4 x 3.1 inches.