A marching tenor drum assembly includes a quad mounting frame and two individual mounting frames for receiving a plurality of tenor drums. A mounting lip of each drum shell rests on the top plate of one of the mounting frames, a compression rim of a bearing ring covers the mounting lip and is fastened to the mounting frame with a plurality of clamp screws. The drum skin of a top head is placed over the top edge of an upwardly extending support wall of the bearing ring. A top hoop is placed over a peripheral portion of the top head and is fastened to the clamp screws.