Photos first: Gut shot: Picked this up last weekend and I've been playing through this non-stop, in band rehearsals and recording with it. It is a riff machine! Here's my impression of it: Like any other amp I get from overseas, the first thing I did was to pull it out of the shell to check if anything was loose and to visually inspect the tubes. Indeed some parts were broken (snapped filter cap mounting screw and power tube key) but everything else looked fine. It has a full set of JJ preamp and poweramp tubes, and updated filter caps. This is a model 1959 made in 1984. It doesn't sound like an usual 2-input master volume JCM800. From what I understand, the circuitry is very similar to the non-master volume JMP's made in the late 1970s. Compared to a normal JCM800, this amp is darker and warmer (still pretty bright!), the attack is a bit slower, and a bit more open sounding. Normally there is no master volume on a 4-input Marshall but this was modded with one (I think it is a PPIMV from looking at the gut, but Marshall gurus, please confirm!). The seller also said it has the input cascade mod but I'm not sure as I am still able to jump the inputs. Without a master volume or attenuation, I have no idea how this amp is even usable, it is fcking loud!! With the inputs jumped, the two input volume levels can be blended. The bright channel volume I have it set quite high but the normal channel volume it is below half way as a setting too high got muddy and really bassy. With EMG's this amp needs no boost at all. With passive pickups I boost it with a Maxon OD9 pro+ with mid boost mode engaged, drive at 9:00, level at 3:00. I have tried a Boss SD1 with it but it feels too stiff. With a ABY box, this amp can be turned into a 2 channel amp. For the longest time I didn't care for Marshalls but this amp has changed my opinion completely. As easy to work with as the 5150 series. Cuts through a mix effortlessly while still sounding thick, without over powering other instruments. Riffing and chugging is AWESOME with this amp, chords sound huge, leads is not as impressive but still totally usable. Another thing I like about this amp is that it has a DI output, which is the poweramp signal lowered to line level. I have made a few Kemper profiles with it from the DI output and they sound killer. But I think it records the best through a cab with a SM57. This is all I've got for now! Cheers!