As per forum rules here is a breakdown of the amp (to the best of my knowledge) . I included a clip, which may be a somewhat poor representation of what this circuit is capable of but I included it anyways
The amp has HRM and NON-HRm Overdrive, Single control clean tonestack with a Rotary Knob to switch different voices (Tweed, Brown,Blackface) and a Buffered effects loop (D-lator).
To my knowledge (please correct me if I'm wrong Henry
 ) the  HRM tonestack has the OD trimmer (AKA Trigger), OD Gain, and OD Volume as well as Treble, Middle, and Bass Controls with MID and Preamp Boost.All on the front panel
 ) the  HRM tonestack has the OD trimmer (AKA Trigger), OD Gain, and OD Volume as well as Treble, Middle, and Bass Controls with MID and Preamp Boost.All on the front panel  The NON-HRm has the same OD trimmer (AKA trigger), OD Gain, and OD Level controls but with no tonestack.
As well as being able to use both Overdrives (1 & 2) cascaded into each other.
The Clean has One Tonestack control, and the Rotary knob with 6 positions of Tweed,Brown, and black face voicings.
The Buffered effects loop does not have send/return controls but is set so that you can thow whatever you want in the loop with no need to muk around with levels to balance everything out, just grab and go.
Youtube Clip:
http://www.youtube.com/watch?v=uSpCa2qxYtQ


 btw this hits some tones I haven't heard from other clips of this amp. makes me want to check one out.
 btw this hits some tones I haven't heard from other clips of this amp. makes me want to check one out.


