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In Reply to: RE: Having midrange failure issues, anyone else? posted by Roger Gustavsson on April 29, 2016 at 09:47:20
The 20.1 use 6um in a push pull magnet structure vs. single ended in the original 20 - they figured they can lower the thickness and double up the magnetic field so would keep power handling roughly the same.
It didn't quite work out that way since the magnet board up front raised air flow resistance so they lost thermal dissipation capacity. For most users that is not an issue. For playback in a really large room it does make a difference - hence the burnt mids..
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Have you seen how they do this? As they need to do the bass and mid on the same structure. Can they repair the mid without destroying the bass?
No, they have to open both sections - that is why it is so expensive to get the repair done. I don't think they actually repair them in all cases, but put in new driver sections if the mylar is damaged, as would be the case from thermal failure.
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