Snagged a killer sounding '79 Marshall JMP. These amps along with JCM800's have always been a "home base" to me and sound great when you hit them with a boost. Check it out! ️
People are figuring out that late 70’s JMPs are a sweet spot 50W or 100W. Not all of them have this mojo - I had a fawn that was plexi clean with the gain dimed. Glad you found a late 70’s one that also gives up the goods!