Atlantic Technology - 6.5" Trimode Thin Bezel In-Ceiling Single Speaker - IC-6.3-SThe IC 6. 3 S Tri Mode two way ceiling mount speakers combine the very best in stealthy trim bezel looks and superb high fidelity sound. Their unique dual voice coil woofers with massive magnet assemblies and dual 19mm soft dome tweeters allow them to be configured for conventional (mono), single point stereo, or dipole surround operation, providing ideal coverage for every application. With their discreet profile and magnetically attached grilles,