Well I picked it up and plugged it on, damn! Sounds heavy as f$*&#k! I can see why these were not popular amps at the time - not the early 80s JCM tone that all rockers wanted at all. It is closer to old Orange/Matamp than the traditional British stuff. Huge, and I mean huge distortion with massive bass response, this is one dark amp. Channel A is brighter and more articulate and I can get a super nice classic heavy rock crunch from it. Channel B, doom metal all the way, just crushing! I have a hard time thinking that Ted Nugent actually played these things. I keep thinking Matamp GT series amps when played. The cleans are almost non-existent, which is cool, I rarely play anything clean. To get something clean at a gigging volume, you really have to crank the drive up and dime the volume. I got a reasonable clean, good enough to use live, but my Orange's clean is the same way, its really gritty, in fact when we recorded, it sounded like I had an OD on my clean channel lol. While many of you wouldn't like this level of fuzzed out, bottom heavy, dark gain - it is exactly the tone I go for with my band and the reason I bought this amp. It kicks all kinds of ass! My GAS for a vintage OR120 is now gone. I got there for next to nothing.
I only had about 15 minutes of playing on it and only got to use my Gibson LP with Burstbucker Pros in it, its one great sounding but dark guitar (again how I like it). I need to try my Flying V and my Moderne through it. My Moderne has Duncan 59s in it and it is super bright, might be a good combination for the amp. I didn't really mess with the EQ on the amp, so I'll spend more time with that tomorrow and see how they will sculpt the tone.
My tech said the amp is really well built, very solid construction and design. He did say it was a little difficult to work on due to the placement of some of the components. There is some strangeness to how they have the speaker outs and OHMs listed on the back (consider the stock cab was 8ohm, it has a 16 ohm out). He really liked the amp (he likes Sunn amps in general and in fact was working on his own little Alpha when I showed up) and thinks I literally stole for the price I paid. He thought I paid 3 times what I did!