I am using a MXL 2006 together with a Behringer MIC2200 Ultragain and I have problems with getting a good volume on my PC. If I set gain and output to max, it will give me below average volume, but then I have almost no chance of messing around with the settings.
If I use them directly in my speakers they are fine, I put gain to roughly 80% and the volume as well and I get a nice and clear signal, so I think the Problem is with my PC.
Currently I use this setup:
MXL 2006 connected over a XLR cable to my Behringer and out of it with a XLR to 3.5 cinch into my PC, due to lacking other options except for USB. My PC has a onboard soundcard that runs with realtek drivers. Feel free to ask for more information.