The Omega Surface is ideal wherever there is a solid ceiling or wall that will not allow a recessed ceiling or wall loudspeaker to be fitted, such as stairwells, underground car parks and other basement areas, control rooms and so forth. This 6W rms ceiling or wall speaker has an aluminium housing and steel grille finished in white. It is suitable for any 100 volt line Public Address system and has power tappings down to ½ watt.