Bogen's MB8TSQ and MB8TSL speakers feature an all-steel surface-mounted enclosure with an 8"" cone loudspeaker and multi-tap 4-watt 70V/25V transformer. The MB8TSQ speakers are suitable for ceiling or wall mounting. The MB8TSL speakers are designed primarily for wall mounting, with front face angled downward by 12.5 degrees. Models with ""VR"" suffix have a recessed volume control at the center of the grille.