The BOSE's FREESPACE DS 100SE is a outdoor full-range surface-mount loudspeakers with exceptional performance for background music and speech reproduction in a variety of installation applications. This public address system has a wide coverage pattern of 180° x 75° with a frequency response of 60 Hz, and two 2.25" (57 mm) full-range drivers and a single 5.25" (133 mm) woofer in a ported enclosure. Horizontal and vertical alignment is possible with adjustable pitch or yaw with the mounting hardware. An integrated multi-tap transformer is incorporated, featuring an ingenious thumb wheel adjustment for quick tap changes from behind the front end cap.