Abstract: An audio full range speaker which achieves the propogation of a peaked wavefront from the diaphragm instead of generating a substantially planar wavefront as in the case of the common speaker construction utilizing a diaphragm driven as a piston. The speaker has a substantially planar, thin, flexible film forming the diaphragm mounted within a frame. The diaphragm is driven by a driver which imparts motion to the diaphragm at a small source area, the motion being imparted in a direction normal to the plane of the diaphragm so that ripples radiate from the drive area and travel at the same time across the flexible diaphragm, one behind the other, towards the frame. The rest of the diaphragm is driven by the central moving portion, endowing it with a built-in time delay. Because of the time delay involved in spreading the energy across the diaphragm, the wavefront radiated by the speaker ges a head start at the center and lags towards the edges.