The present invention comprises a tile-mounted ceiling speaker that combines the ease of installation of a lay-in speaker system with the visual appearance of a tile-mounted speaker system. In one or more embodiments, the apparatus of the present invention includes a support frame and back box assembly configured for installation on top of a ceiling tile and a loudspeaker cartridge configured to be mounted to the support frame through an appropriately-sized hole in the ceiling tile. In one or more embodiments, the invention comprises a peripheral flange and a plurality of flip dogs for mounting the cartridge to the support frame that are configured to be disposed in the interior of the back box when engaged.