Mechanically adjustable variable flux speaker

摘要

The present disclosure is directed to inventive methods and apparatus for a variable flux speaker subassembly for a loudspeaker. The variable flux speaker subassembly may contain at least one repositionable structure that is repositionable from at least a first position to a second position. The magnetic flux through a voice coil structure of the speaker subassembly is altered when the repositionable structure is moved from the first position to the second position.

主权项

1. A speaker subassembly for a speaker, said speaker subassembly comprising:
a top plate having a top plate opening therethrough; a magnet structure in magnetic communication with said top plate, said magnet structure surrounding and defining a magnet opening; a pole piece positioned interiorly of said top plate and said magnet, said pole piece having an upper end, a lower end more distal said top plate than said upper end, and a longitudinal axis extending from said upper end to said lower end; a voice coil structure substantially concentrically disposed about said pole piece, said voice coil structure having a voice coil magnetic flux extending therethrough; and a secondary magnet structure in magnetic communication with said top plate;
wherein said secondary magnet structure is repositionable from at least a first fixed position to at least a second fixed position;wherein in said first fixed position of said secondary magnet structure said voice coil magnetic flux is greater than in said second fixed position of said secondary magnet structure.