So turns out that I met with the guy selling the preamp and we got ourselves a deal and I got the preamp.
Just to establish a reference the signal chain is as follows:
custom guitar mahogany body/maple top/ebony fretboard>high output pups>studio pre>mesa 20/20>randall 2x12 celestion V30 and for comparison custom made 2x12 with Eminence Lynch Super V12
My first impression was that this pre is not a plug and play as I had to work the knobs quite a bit until I figured out how to make it work for me.
It is definitely a bit hard to keep the "flubbiness" of the low end and although I agree that the pre has enough gain, one can never have too much gain
Perhaps a little boost would be good just to tighten the low end and add a bit of bite.
I tried a SD-1 as a boost and it works like it's supposed to but it also adds that mid range sound that destroys the shape of the sound one carves with the controls and the graphic eq.
There is a midrange frequency that I'm trying to dial out but I can't seem to get it, and I'm not entirely sure if it's in the upper or lower midrange as I was pretty tired when trying the preamp.
Perhaps it's that through my experience I'm more used to the sound of 4x12 celestion G12T-75 than the 2x12 V30's, I should say now that I'm a new user of the V30's and I've had them only for a few months.
Another reason could be that now I'm playing a 2x12 instead of a 4x12 which normally has more thump and punch?
Crunchy rock tones from this pre are thick and exactly crunchy, very creamy overdrive and very pleasant to the ear, very well balanced sound overall even when turning the knobs to the extremes. Again the low end needs a little attention but certainly not as much as when trying to get a high gain metal tone.
Getting a nice well rounded clean tone was pretty easy and I would say this is like a plug and play in this preamp.
Now, to my surprise the pre is not in absolute mint condition, it has been used and sadly not taken good care of, some knobs are cracked (how can one manage to do that?) and the footswitch jack (both rear and front) make some weird noises when one connects the plug in, these things are easy fixes.
As I'm not familiar with this pre, I'm not sure about how the 2 channels work with each other, it is a bit hard to control the knob settings for both channels as they are shared, sure the graphic eq helps but it seems that in the lead channel the bass knob needs to be very low and in the rhythm channel a bit higher.
Something that grabbed my attention was that when switching to the rhythm channel from the lead one the gain gradually (very fast actually but still noticeable) reduces itself to what the rhythm channel's gain knob is set to.
Perhaps it would also be a good idea to swap in some new tubes.
So all in all this is a very versatile preamp and definitely a really good one. I reckon modern high gain sounds are not its forte but they are attainable with a good boost.
Now I have some questions for the more experienced users in this forum.
-Will fifty/fifty work better than the 20/20 with this preamp? Some say the EL84 are not deep enough specially for high gain tones.
-Does anyone recommend going back to the G12T-75 instead of the V30? Perhaps the G12K-100 or some other Eminence?
-This pre didn't come with the rack ears, where do I get those?