attached directly to the wallboard which is provided with an oversize opening by means of screws 146 which constitute an attachment means the loudspeaker 30 is attached to the interior flange 120 by screws and clips as previously discussed but not shown in fig9 the baffle 160 is different from that described in the previous embodiment in that it includes a recessed center grill portion 161 but is substantially identical in that it includes a plurality of welded studs 162 which cooperate with the threaded clips 164 fixedly attached to the exterior flange 122 of the enclosure portion 116 it is thought that the structural arrangement of parts and functional features be readily understood from the foregoing description of parts however for completeness of disclosure the installation of the assembly will be briefly described with reference to the first embodiment of fig1 8 the enclosure 12 is formed into an integral unit by pushing the lower portion 14 into the upper portion 16 and attaching the two portions together by intermittent spot welds 28 the l shaped members 44 of the ceiling attachment clamping members 50 and the baffle attachment clips 64 are riveted in place the clamping members 50 are emplaced by screws 46 which are initially rotated to the position shown in fig4 so that they are alongside the enclosure sidewall 19 the enclosure 12 can then be pushed into place inside the recess provided by the preformed ceiling opening which is approximately the same size as to comfortably fit the stepped portion of the exterior flange 22 with the exterior flange 122 engaging the wall.