Pair of real wood bookshelf speakers with all MDF construction and resonance-free enclosures;Equipped with one 5.25-inch dynamic balance mineral/polymer composite cone driver;Features Power Port technology to reduce chuffing or port noise;Equipped with one 1-inch silk/polymer composite dome tweeter;Features a neodynium magnet, low viscosity ferro-fluid cooling, and a heat sink on the back of the magnet