The Atlas APF-15 offers 15 watts of constant power handling with superior intelligibility and efficiency. Model APF-15T includes the Vari-Tap Control/connect center with 7 position, wattage/impedance selection switch. Magnet assembly comes with self-aligning field replaceable diaphragm. Weather-resistant metal construction and encased wiring terminals eliminate the need and cost of a backbox. However, for cosmetic consideration and retrofit convenience, models will flange mount to any conventional size ceiling or wall baffle and/or enclosure capable of accommodating standard 6" or 8" diameter loudspeakers.