[Scott Dorsey]

Peter Larsen wrote:
Scott Dorsey wrote:

My level of information is that the mic is balanced out, the preamp
is however not balanced in.

You want balanced in! It is your only salvation especially when
dealing with fairly high-Z inputs!

It is not a high-z input, it is mc-preamp chip, HA12017 if I remember this
correctly, we made some mc preamps in a club that once existed.

That is pretty high-Z in. If it doesn't have a transformer on the front
end or a grounded-base input stage, it's going to have something north of
1K in, which is a good thing from a ribbon mike perspective and bad for
an SM-57.

Same goes for all those Mackie input stages.

Try just the normal THAT1015 preamp chip instead. Reasonably high-Z
input, lower noise than a 1:2 transformer, inexpensive. Good
balancing.

Hmmm .... dunno about another diy ... but a Grace stereo pre - that seems to
be the alternative - may or may not be cheap, but does cost a lot of money
as seen from my current budget.

It's a step up from the THAT1015, but the DIY is pretty easy. Check out
the datasheet.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."