SM-UB1 Universal Mounting Bracket. Slider range ID 24.2cm to 44.7cm. The SM-UB1 is designed to fit as many bracket mounting ready speakers as possible. The center slots allow for “single center hole” speaker mount- ing points, such as: PMC 6, Neumann KH 310, DynAudio Core 7, 47, 59, Meyer Amie and more.