Importance

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Abstract

Acoustic speaker cones have a plurality of thin, pie-shaped segments radiating outwardly from their center with each of the segments having an arcuated cross-section. The cones are made of polycarbonate plastic and take the form of being convex towards the center for high frequency cones or of being concave towards its center for larger broad range cones. The present invention is also directed to a system containing both the aforesaid high frequency cone, and an outer broad range cone with similar radial characteristics The segments of the outer cone preferably terminate at a flexible, high sound absorption ring. The center cone fits within a central orifice at the center of the outer cone. The polycarbonate cones have a specific gravity of about 1.10 and about 1.40, having an electrical dissipation factor of about 0.05 to about 0.30 at 60 Hertz, having an electrical dissipation factor of about 1.00 to about 1.25 at 10.sup.6 Hertz, and having a thermal condutivity of at least 1.2 BTU/hr/ft.sup.2 /.degree.F./in.

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First Claim