The BOSE's MB24 III low-frequency passive speaker are meant to supplement Bose LT arrays and other subwoofer applications with additional bass. When utilised with LT mid/high loudspeakers, the compact 2 x 12" (305 mm) arrangement enables for minimal-height arrays. Using Bose Modeler® tools and optional rigging hardware, directional bass arrays with MB24 loudspeakers are simple to build and install.