The speaker used in the SD72WV is the next generation of Atlas high performance cone loudspeakers, very similar to the preceding C-Series speakers. The similarity in the sonic qualities ensures that contractors and designers who have worked with the Atlas Sound C-Series in the past will know exactly what to expect when they use the SD72WV. Also known as -10W Ceiling Speaker, Wall/Ceiling Mounted Speakers-10W Ceiling Speaker - SD72WV