The Bogen HFSF1 High-Fidelity, Small-Footprint Ceiling Loudspeaker delivers superior sound in a very compact enclosure. The speaker measures 7-1/4" diameter and mounts easily in all types of ceilings including existing hard-surfaced types and suspended type. Several levels of power output can be controlled directly from the front baffle via a rotary tap selector switch under the grille. The low-distortion, coaxial-design speaker, coupled with a computer-matched venting system, delivers superb fidelity for music as well as high intelligibility for voice reinforcement. Coupled with the Bogen CSUB Ceiling Subwoofer, it provides the perfect solution for environments that require the highest-quality sound with minimal visual impact. Superior sound in a very compact enclosure Wide-dispersion coaxial driver for broad, even coverage; superb off-axis response Small footprint, visually appealing Only 7-1/4" face diameter Installs in wide range of ceiling types For 70V and low-impedance systems Selectable power taps via front-mounted control (under grille); 16, 8, 4, 2, 1 watts at 70V 16-ohm Input setting for low-impedance systems (selectable via front-mounted control, under grille) Quick wiring with removable plug-in connector Plug-in connector provides loop-through terminals for next speaker Terminal cover provides knockout for flexible conduit connection Compounded rubber surround for lasting performance year after year Integral mounting clamps tighten quickly and firmly Attachment point for seismic safety cable Off-white textured finish easily painted to match room decor Available accessories: Tile Bridge Support (TBSF), Safety Cable (CK10), both sold separately