I've been reading about cool pres here...
https://seventhcircleaudio.com/
 
And I was considering getting a 2U Unit and trying to assemble the Pres myself.
 
I bumped into 'DC Offset Trim' and I suddenly realize that the problem I've been having with certain Mics when recording at very high volume is related to DC Offset Trim.
 
The Mics sometimes clip only above 0 not below. I've posted photos in the past.
 
It looks like the cause of this might be DC Offset. Or at least, I might be able to get a little more headroom on some of these Mics if I had a DC Offset Trim button on the pre.
 
http://groupdiy.com/index.php?topic=2479.0
 
 

you can have sonar use dc cut during tracking.
it's just an 'off/on' switch.
 
i always have it on.
 
and when i master, i always do a 'analysis' of the file, for dc, and i rarely ever have any.
 

Hey, BatsBrew, Thanks for reading!
 
I think this is actually something different from that.
 
It's a PreAmp level thing that can cause clipping above zero and not below.
 
When the signal is loud, you are at greater risk of this problem.
 
Frankly, it explains exactly the problem I was having using condensers on guitar cabs. Switching to the Ribbon has solved the prob for me in part b/c the input level of the ribbon is so much lower. Additionally, I can solve the prob by using a pad on the input, like a pre-amp that has a -10dB pad or something.
 
I just thought it was cool to learn about. This describes exactly what I've been seeing in wave forms. For that matter, I returned a Mic to MXL over it and they helped me get the ribbon.
 
Now, I substantially better understand the pre-amps and this constraint.