17 cm (6.5") ceiling speaker with corrosion free grille (RAL 9010), suitable for the installation in suspended ceilings of any material. Equipped with a full-range driver. Quick snap-in mounting due to round ceiling cut-out through which the speaker with transformer and mounting ring can be installed. A screw terminal block (ceramic terminal with thermal fuse) allows the connection to the 100-Vnetwork including the eventually necessary level adjustment. Easy installation provided for the grille by a quick-mounting bayonet and for the protective cap by snap-in springs.