AudioBanter.com - View Single Post - Why does one Neumann M49 has less high end than the other? Can I fix it?

In article writes:

I've got two nearly identical Neumann M49c for testing. One is a rental one
I really like and the other one is the mic I'm considering to buy.
The one I'd like to buy sounds quiet nice but the rental M49 has much nicer
high end and about 8db more output level.
Does anybody have an explanation for that?

Yeah. They aren't identical. Don't buy the one you don't like. If the
dealer said he just replaced the "diaphragm", that sounds like
trouble. Either he doesn't know that it's called a "capsule" (or you
don't, unless that's what they call it over there) and that it's
something that should be replaced by a specialist. If he has a receipt
from Neumann or one of the trusted mic repair shops that he can show
you, give the shop a call and ask what they did to it.

Maybe the dealer replaced it with a Chinese "diaphragm".

By the way, it's really smart to compare the mic with another one that
you know you like. If you had just bought it outright without hearing
another one (as some people do) you might have been satisfied and not
know what you're missing.

--
I'm really Mike Rivers - )