improving mic pre stage

my mic input is similar to project66

http://sound.westhost.com/project66.htm

what could be the first step to improve performance?
adding a transformer like jensen discribes in

http://www.jensen-transformers.com/as/as015.pdf

?

pictures of my 8 channel mixer with direct out come soon.

what could be the first step to improve performance?

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I don't know...that circuit is a pretty good design, and I think Rod's work is pretty well respected around here. Plus, variations of that topology have been used in many consoles. If done right, it's pretty hard to beat in terms of CMRR and noise floor.

If you're doing a trafo input, my guess is that you'll most likely want to lose those two differential pairs (Q1-Q4).

Did you build the stock version? If so, how does it sound?

What needs improving?

thanks for your answers.
the mic amp is not the project 66 , its from a studiomaster module.
couldnt find the schematic for mine, but a similar one, the
club 2000 from http://mysite.wanadoo-members.co.uk/studiomaster/


i took 8 of the 16 input channels from the old mixer and stuffed it together into a smaller unit(mobile recording). i would show some pics, but the upload on groudiy doesnt work at the moment.

cj, best way to describe like this : it doesnt sound that different from behringer, except some more noise

Oh Lord Mercy on your soul.

We can help. But it's gonna take money. :grin:

it doesnt sound that different from behringer

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I think that the Behringer console's circuit is similar--except that they use the 4580 instead of the 4560. Did you keep the 4560's in there?

in fact its a tl072... i didnt change the original circuit yet (except the psu)