A vehicular loud speaker cabinet assembly (20) attaches beneath the headliner portion (180) of the vehicular roof and is supported thereagainst in various ways. The vehicle (24) may include a structural roof member (22) interconnecting the respective B pillars (54) such as common in small recreational vehicles. The cabinet assembly (20) for this vehicle (24) includes forward and rearward edge rims (36, 38) which are received along the pinch weld portions (60) of the structural roof member (22) and are functionally and decoratively secured thereto by a moisture seal (62). Alternatively, the cabinet assembly (120, 220) may be provided with threaded fasteners (184, 284) which extend upwardly through the cabinet assembly (120, 220) for anchorage above the headliner portion (180) of the vehicular roof. The threaded fasteners (178) may be used to secure the original equipment dome/cargo light assembly (170) in place. The cabinet assembly (120) includes two spaced ends (134) provided each with curved flanges (152) for retention above the side garnish molding (174) of the vehicle (124).