Constant pressure ceiling loudspeaker wire usually uses RVS2*1.5 twisted pair wire for indoor iron pipe, and RVV2*1.5 sheath wire is usually used outdoors. If the project site is large, in order to reduce line loss, thicker signal wire can be used. Various external interference signals at the scene are large and the distance is long, and the RVVP sheathed cable with shield can be used, which can sometimes solve various uncertain problems such as noise and humming. For public broadcasts that require fire-fighting broadcast linkage with a strong-cut volume control, a separate power cord for 24V strong-cut triggering needs to be laid.
The fixed resistance ceiling speaker wire usually adopts the professional speaker wire, the scientific name is gold and silver wire, which is a cable with two copper wires, one red and one white, wrapped in transparent rubber. Usually "branch" is used to represent the unit, there are 100, 150, 200....
