Sorry ask again if this was already covered in another post but what is the preamp tube layout of the MA100H? I presume the one next to the EL34's is the PI but not sure on the other 2.
SteveD, any chance you could also divulge what factory/manufacturer the Marshall branded preamps are from?
Oddly enough I bought the amp fully expecting I'd be returning it to the store within 30 days after I got the GAS out of my system, however after gigging with it last week I think it may be a keeper. Great clean channel, syrupy sweet and chimey at the same time and overdrive side to my ears has the clear open "bossy" Marshall sound I'm looking for. Reminds me a lot of the JTM/JCM600 series I've heard but hopefully without the design issues.
I think however the Marshall marketing dept missed the boat a bit with the naming though. Personally I think calling it something like JCM500 may have made it sound a little more acceptable and serious rather than MA which just seems to have a cheap ring to it right out of the box.
But for what my opinion is worth I think you did a stellar job on this one Steve. Now if we could only just rename it and add a dedicated solo boost knob I'd gladly pay double for one. :~)