Gearslutz.com - View Single Post - links to a couple of interesting mic pre schematics.

tINY · 9th September 2004

There is certainly something apealing about X-former based mic pre-amps. It certainly improves CMRR and cross-talk performance over all but the most carefully designed direct coupled amplifiers.

I think there is some Mojo going on in the transformers. I suspect it is 2nd order harmonics from hysterisis. But, they don't cover that much in universities any more.

-tINY

9th September 2004	#17
tINY Gear Guru Joined: Jul 2004 Location: Orygun Posts: 10,228	There is certainly something apealing about X-former based mic pre-amps. It certainly improves CMRR and cross-talk performance over all but the most carefully designed direct coupled amplifiers. I think there is some Mojo going on in the transformers. I suspect it is 2nd order harmonics from hysterisis. But, they don't cover that much in universities any more. -tINY