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Question about Panasonic electret capsules

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Does anyone here have any experience with these?

From what iv'e been reading, they're some of the better electrets out there.
I'm specifically looking at the omni capsules.

What i'm hoping to find out is how much difference there would be in sound quality from the 9.7mm to 6mm to 4mm capsules.
The specs don't seem to be much different, but I wonder if there's much of a sound quality difference.


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