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In Reply to: Tad 4001 diaphragm question posted by Trekman on March 03, 2004 at 23:54:10:
From what I understand, they have always been Be; never anything else. And they are not interchangeable with any other brand due to slight size differences compared to JBL. However, Radian makes an aluminum 4001 substitute. I've never heard either of them though.
Follow Ups:
Thanks Neil. I was concerned because the used prices seems to go down much greater with age. I understand alnico magnets demagnitize over time, but I am hoping this won't be noticable, or these drivers would truly be worth much less. I didn't want to save money at the expense of not having a supposedly superior diaphragm, which for a TAD, would be the Be, I would suppose.
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Talk to Paul Butterfield, he's "dman" on Tad's.
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