Bose Freespace Ds 16F | Full Range Ceiling Flush Mount Loudspeaker White Full-range loudspeaker with a single 2.25 inch (57 mm) driver in a ported enclosure to deliver a 140 degree conical coverage pattern and clear, intelligible music and speech reproduction for flush-ceiling or pendantmount applications Integrated multi-tap transformer with innovative thumb wheel adjustment for easy-to-change tap setting from underneath the loudspeaker grille Shared voicing across entire freespace DS product family enables DS 16, DS 40 and DS 100 loudspeakers to be integrated on the same system and maintain consistent tonal quality Can be combined with either surface- or flush-mount freespace 3 acoustically module for extended bass response Supported by a suite of accessories, including ceiling-mount bracket, adjustable tile bridge, pendant-mount kit and square grille