Abstract: An electrodynamic acoustic transducer has its diaphragm with a coil retained with respect to the magnetic system in discrete points along the periphery of the diaphragm, while the rest of the periphery of the diaphragm is not fixed. The diaphragm has tongues at its periphery which are thicker than the rest of the diaphragm, and which are retained between two ring-shaped engagement faces, which, in the preferred embodiment, are formed by a magnetic system which is arranged symmetrically on both sides of the diaphragm. The diaphragm has a flat coil with spiral wound windings, and the diaphragm with coil and termination is supplied integrally with a web of sheet or a film roll comprising a large number of diaphragms, making the diaphragm useful for mounting in the transducer by tape automated bonding.