Well, the veneer starts to sag, spots start showing up, they lose thier shine, and no matter what music you play all you hear is them sing about the old days and how newer speakers have no respect.
S7horton, The shelf life of butyl rubber is 10 years as per MIL-HDBK-76? (Age Control Of Elastomers). Sure enough after 11-12 years of purchasing my AR-11's back in 1975 the woofers had to be replaced.
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