Cap and center pole apparatus and method of coupling

A speaker center pole assembly comprising:

• a center pole having a column portion including an aperture through a longitudinal axis thereof;
• a distortion reduction cap coupled to said center pole, wherein said column portion of said center pole includes a frustoconical recess on a top surface of said column wherein said distortion reduction cap is formed with a corresponding frustoconical portion mating with said frustoconical recess on said top surface of said column;
• an annular groove formed in said aperture;
• a dust screen placed in said annular groove;
• and
• a retaining ring adapted to secure said dust screen within said annular groove.

A speaker assembly comprising:

• a distortion reduction cap;
• a center column comprising a top surface on one end of said column and an outer column surface;
• a gripping surface formed on said outer column surface;
• and
• a frustoconical recess on said top surface of said column;
• at least a portion of said gripping surface is raised and extends radially outward from the outer surface of said column, said gripping surface comprising a plurality of grooves arranged in a predetermined manner;
• said distortion reduction cap is non-rotatably coupled to said column such that a first portion of said cap is deformed against said gripping surface and a second portion of said cap is deformed to form a corresponding frustoconical portion mating with said frustoconical recess on said top surface of said column.

A speaker assembly comprising:

• a distortion reduction cap;
• a center column comprising a top surface on one end of said column and an outer column surface;
• a gripping surface formed on said outer column surface;
• and
• a frustoconical recess on said top surface of said column;
• at least a portion of said gripping surface is comprised of a plurality of indentations formed on said outer surface of said column arranged in a predetermined manner about the circumference of said column;
• said distortion reduction cap is non-rotatably coupled to said column such that a first portion of said cap is deformed against said gripping surface and a second portion of said cap is deformed to form a corresponding frustoconical portion mating with said frustoconical recess on said top surface of said column.