Use the IP-STB, tile brige, to install the AtlasIED IP-SM and IP-SM-72 IP speakers in drop tile ceiling applications. The IP-STB is the perfect accessory for mounting this IP speaker in applications where surface mounting is either not available or impractical. The IP-STB provides the support and stability required to install the IP-SM and IP-SM-72 in a standard 2' x 2' or 2' x 4' drop tile ceiling tile.