Dumb question, but have you tried the user adjustable plate voltage and input impedance settings yet? Might make things more to taste. Maybe you could post what you think is missing or needs correcting 'soundwise'. That would help.
I don't want to sound glib, but other users have found out that this, and the less expensive ART pres, are more useful as effects then as a first-choice mic pres. IMHO, those opinions are validated by the modest price of the unit.
Try going to
MusicPlayer Forums: Viewing list of forums , register, and repost on the 'Project Studio' forum. Several guys there own and have discussed this pre.
Best, Paul