Im not sure which forum this should in but, has anybody used a rackmount guitar preamp to get their od or distortion. I have been looking into this for awhile but I havn't seen too many rack units for guitar kicking around the local stores. I'm looking for an actual preamp, not a multi-effects. I would like to put one in an effects loop that can be kicked in or out so as not to alter my tone when not in use. Something with two or three channels would be great. Channel 1 grit & 2 all out guitar distortion.