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Whats the lifespan of the cassette medium

I tried to reuse some 30 yr old cassettes and the firt thing I notice that I cannot set bias on them correctly anymore. I tried to record some albums that I have on these old timers and it just sounds awful: garbled on one channel and reduced output on the other. I've tried a few old cassettes like that with the same results. New cassettes show no such problem so I know it's not the deck. Majority of the tapes were TDK SA znd I think they were treated fairly, kept in a dark plastic cassette storage system with 6 drawers with each drawer holding about 15 cassettes. They were kept out of sunlight snd away from magnetic fields produced by speakers and such snd krpt at room temperature. Thats why I'm surprised. What is the average lifespan of the cassette as a medium?

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  Michael Percy Audio  

Topic - Whats the lifespan of the cassette medium - 3db 08:27:42 03/10/17 (5)


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