The MSUB18-I is the same width as the GEO M12 main cabinet, and 141% higher. Cabinets are constructed from Baltic birch ply with large composite bumpers on the corners, and feature integral rigging. Employing a single 18″ diameter voice coil Neodymium driver in a high-efficiency band pass cabinet design with a quadratic shaped profiled port, the MSUB18 can be deployed in Omni or Cardioid modes and is available in black, white or custom RAL colours. The MSUB18-I is the installation version.