DaveD Posted January 20, 2006 Report Share Posted January 20, 2006 A little off topic here, I am, but still in the family. The driver experts here can probably answer this for me.On the 8 inch woofers of the Kloss Cambridge Soundworks Ensemble, the original examples have a butyl rubber surround. It is dull black in appearance. This surround also appears in some examples of the final version of the speaker, the New Ensemble, constructed in China-- although the original ones are in a basket with 4 screw holes (probably cast) and the final ones are in a basket with 8 screw holes (probably stamped). This 8 screw hole driver with butyl surround is also used in some examples of the Powered Subwoofer II.In the middle period, some examples have a surround that is black and very shiny, also in a basket with 8 screw holes. The same driver is used in some examples of the Powered Subwoofer II. What is this shiny surround material? It is not foam, but has a smooth surface like the dull surfaced butyl. Is either one of these materials more resistant to ozone than the other one?Is the dull butyl more resistant to ozone than the modern foam surrounds? Link to comment Share on other sites More sharing options...
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