Audio loudspeaker magnetic system has pole core enclosed by magnetic ring sandwiched between upper and lower pole plates of defined geometry

摘要

The magnetic system has opposing pole plates (1,3) and a pole core (4) which are made of ST37-2 steel or a similar metal, the upper pole plate having a thickness of 12.73 or 5.44 mm, an outer diameter of 114.17 or 116.9mm and an inner diameter of 40 mm, with the magnetic ring (2) between the pole plates made of NdFeB or a similar magnetic material and having a thickness of 5.44 mm, an outer diameter of 89.7 mm and an inner diameter of 42 or 43.5 mm. The individual components of the magnetic system are screwed or glued together.