A panel mount speaker system including a housing having flange and wall portions, a locating portion defining a primary support surface as a concave annular spherical segment; a secondary support member defining a secondary support surface as a concave spherical segment opposite a main pivot point; a main speaker mount having an outwardly facing primary engagement surface slidably engaging the primary support surface; a main speaker unit coaxially mounted to the main speaker mount; a secondary mount member fastened to the stator element of the main speaker unit and having an outwardly facing secondary engagement surface slidably engaging the secondary support surface; an auxiliary speaker; a grill structure pivotally supporting the auxiliary speaker forwardly of the main speaker unit; a crossover network connected to the main speaker unit and the auxiliary speaker; a circuit panel mounting elements of the crossover network oriented and supported perpendicular to the housing axis, the panel flexing in response to axial loading of the secondary support member for preloading sliding engagement of the main speaker mount.