The ceiling speaker DL 72 is equipped with a high-performance full range chassis with dust cover as well as a 100 V transformer. The metal front grille is tightly connected to the outer plastic ring. Using spring clamps the unit can be installed in a ceiling. DL 70 W and PL 70 W are ceiling speakers equipped with a highperformance full range chassis along with a dust cover and a 100 V transformer. Both types possess a white metal front grille with bayonet fixing. This one is connected to an outer plastic ring at DL 70 W and to a square plastic cover at PL 70 W which has been especially designed for mounting into panel ceilings. Using spring clamps the speakers can be installed in a ceiling.