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Sorry. I have not done any of those mods so not much help. The two most well known replacement tops are GAHH and Robbins. No idea which fabric is best. Gahh tops have had many satisfied customer responses here.
The Bose SW runs at a very low impedance so if you plan to use the existing amp make sure the speakers you choose match the impedance needed. Are you sure the speakers are bad or did the amp trip a fuse or breaker?
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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