Not sure if this is the best place to post , but let me share some experiment I did
i was browsing through some profiles that i did, from one Ehx tube preamp ( http://www.ehx.com/products/lpb-2ube ) and some "magic" happened
this is not a guitar preamp , is a "generic" tube preamp.
I increased the gain , tweaked some parameters , add one of my cab´s and the "magic" happened
the profiles are in the rig exchange, look for kosta or ehxlp2ube
first the original profile , then original profile + tweaks + cab , then rock & roll
its sounds strangely like an amp