The MBI Spectrum Panels are ideal for ceiling spaces that have electrical, mechanical, and fire suppression systems close to the deck. MBI Spectrum Panels are installed directly to the roof deck. They provide excellent absorption when Cloud-Lite Baffles and Lapendary Panels are not a practical solution. The MBI Spectrum Panel is constructed of a semi-rigid fiberglass core that is self-supporting and will not sag over time. It can be covered in acoustically transparent PVC film, sailcloth, or any variety of fabrics.