AtlasIED SD72WV - 8-Inch Dual-Cone In-Ceiling Loudspeaker with Transformer and Volume ControlThe speaker used in the SD72WV is the next generation of Atlas high performance cone speakers, very similar to the preceding C Series speakers. The similarity in the sonic qualities ensures that contractors and designers who have worked with the AtlasIED C Series in the past will know exactly what to expect when they use the SD72WV. Model SD72WV is a 25 watt 8" (205mm) speaker with a 10oz. (260g) ceramic magnet. It includes a curvelinear, treated