Bose Flush Mount Virtually Invisible 791 in-ceiling speakers Tech 17/02/2014 Audio Bose Flush Mount speakers for ceiling From the Bose Flush Mount speakers series, the Bose Virtually Invisible 791 speakers, designed for in-ceiling mounting. two angled 1″ dome tweeters one 7″ woofer 8-ohm impedance (recommended amplifier rated from 4 to 8 ohms) 10-100 watts recommended power spring-post terminals paintable white finish on grilles and grille frames cutout dimensions: 8 5/8″ diameter outer diameter: 10″ (25.4 cm) mounting depth with grille: 4.66″ (12 cm) 2.2 kg weight / each (4.73 lbs) Installation Guide