Sony SS-MB150H Bookshelf Speakers (Pair) (Discontinued by Manufacturer) 2-way, ported (bass-reflex) bookshelf speaker with 120-watt maximum power handling, 8-ohm speaker impedance 5.25-inch Kevlar/HOP (high strength, low weight, and low resonance) driver and a 1-inch tweeter Nano-Fine balanced-dome tweeter rated to 50 kHz; bass response extends to 80 Hz Includes 2 lengths of 8-foot speaker cable and removable speaker grilles Measures 6.6 x 9.8 x 7.2 inches (W x H x D)