The Bogen Models S86 and S810 are 8" unmounted cone-type loudspeakers with 6- or 10-ounce magnets,with or without speaker transformers. Models with transformers work with both 70V and 25V amplifier outputs. 7 watts and 15 watts power handling capacity 8" cone speaker for excellent audio quality Available with transformer mounted and wired (T725 models) Available with screw terminal strip (BR models) Easy to install in wall baffles or ceiling grilles