Definitive Technology Mythos SSA-42: Single speaker surround solution Single solo surround array loudspeaker Three 3.25-inch BDSS high-output drivers with coincident array 0.75-inch ferro-magnetic fluid damped pure aluminum dome tweeter Two 3.25-inch BDSS high-output full-range drivers Four 3-inch full-range high-output surround drivers with butyl rubber surrounds Frequency response: 60Hz - 30kHz