RCF DM 61 Powered Speaker.A small two-way speaker for constant voltage systems is the DM 61. The speaker reproduces sound naturally and smoothly, making it perfect for use in indoor and outdoor background music applications as well as business music systems. The two wire cable protruding from the back of the loudspeaker is used to connect to the loudspeaker line. The enclosure comes with a wall mounting attachment and a protective perforated grille.