Audio speaker and method for assembling an audio speaker

A method of assembling a vibration system of a speaker to a driver unit of said speaker, said method comprising:

• disposing a quantity of volatile magnetic fluid containing a pre-determined amount of lubricating oil into a radial gap of said driver unit;
• aligning said vibration system with said driver unit wherein a voice coil of said vibration system is movably mounted into said radial gap;
• fixing said vibration system to said driver unit;
• and
• evaporating substantially all of a volatile component of said volatile magnetic fluid from said radial gap.

An audio speaker comprising:

• a driver unit having a support frame with a central portion forming a magnetic pole case defining a radial gap;
• a vibration system having a diaphragm and a voice coil attached to one side of said diaphragm wherein said vibration system is fixed to said driver unit and wherein said voice coil is movably mounted in said radial gap;
• and
• a residual magnetic fluid layer disposed on the surfaces of one or more of said magnetic pole case and said voice coil wherein an air gap exists between said voice coil and said magnetic pole case, said residual magnetic fluid comprising a plurality of magnetic particles dispersed in a lubricating oil.

An audio speaker comprising:

• a driver unit having a support frame with a central portion forming a magnetic pole case defining a radial gap;
• a vibration system having a diaphragm and a voice coil attached to one side of said diaphragm wherein said vibration system is fixed to said driver unit and wherein said voice coil is movably mounted in said radial gap;
• and
• a volatile magnetic fluid containing a pre-determined amount of lubricating oil, said volatile magnetic fluid temporarily disposed in said radial gap about said voice coil, said volatile magnetic fluid having a volatile carrier liquid.