Multiple Coil, Multiple Cone Loudspeaker Free

A consideration of the direct radiator loudspeaker shows that to obtain uniform response, relatively high efficiency and adequate power handling capacity over a wide range requires a large diameter, rugged diaphragm and heavy coil at the lower frequencies and a relatively light weight vibrating system at the higher frequencies. This paper describes a number of direct radiator loudspeaker systems which satisfy these requirements: the double coil, single cone loudspeaker; the single coil, multiple cone loudspeaker; the double coil, double cone loudspeaker; the multiple coil, multiple cone loudspeaker.