Patent ID: 8520887

Claim:
A full-range transducer comprising: a frame to which are coupled a plurality of magnets and a diaphragm under tension wherein the tensioned diaphragm is disposed between at least two of the magnets, wherein at least 85% of an active area of the diaphragm has substantially the same tension, and wherein the magnets are arranged relative to each other such that: (a) an intermagnet gap between the at least two of the magnets is selected such as to allow diaphragm excursions of the tensioned diaphragm for production of sound pressure levels of at least 120 db at 1 m distance; (b) average magnetic flux density between the at least two magnets in a plane perpendicular to the diaphragm is at least 0.35 T and is substantially homogenous across at least 70% of a distance between the at least two magnets; (c) average magnetic flux density between a third magnet and one of the at least two magnets in a plane of the diaphragm is at least 0.3 T; (d) wherein at least 60% of an active area of the diaphragm are covered by a voice coil; and wherein the magnets and the voice coil are arranged relative to each other and wherein the tensioned diaphragm is under a tension such as to allow pistonic movement of the active area of the diaphragm to thereby reduce dispersion of sound.