Ultimate Support MS90 Monitor Stand Pair The new MS MKII Series studio reference monitor stands offer unparalleled innovation and strength for professional, project, and home studios alike. The MS-90 is a column monitor stand that features three internal channels – two for audio and power cables and another larger channel for shot or sand. From top to bottom, the MS90 stands offer sonic isolation and decoupling components. Acoustic foam and stabilizing pads on top, two rubber couplers between the column and the top/bottom plates, and spike decoupling designs under the top and bottom base plates.