My Koss Porta Pros, before and after
We tested Koss's lifetime warranty on all headphones purchased after July 1989, and it still holds true.
The wire on my old personal set of PortaPros began to fray after several years of daily use. The plug is a typical area of strain for headphones.
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The wire on my old personal set of PortaPros began to fray after several years of daily use. The plug is a typical area of strain for headphones.
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Two weeks after shipping them out to Koss with a $6 check and all relevant information enclosed, I received a new pair!
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