Not me as they're rather expensive for me. and I also don't have the space for them. I have owned the 602's and currently own the CM7's. My 602's held up well and I sold them to a lucky Agoner after 12 years of enjoyment. I didn't notice any issues with my kevlar drivers on the 602's but that doesn't mean it wasn't there. Maybe that's why I sold them. I'm sure if it happens with the mid drivers, it can happen with all the kevlar drivers in their lineup.
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