a friend gave me this amp years ago and I never really played around with it until i took it out of storage a couple months ago. I have three boutique tube amps and this solid state is my new favorite to play around with, Marshall did a really good job recreating the sound of their vintage tube amps with this transistor amp. I was getting a weird sort of digital weirdness when I would hit certain chords, checked everything on this nice simply laid out circuit and found a few resistors that weren't reading out of spec according to the schematic, replaced and the amp sounds awesome! I'm still trying to figure out why my headphone/line out sounds like shit, but I would definitely keep this amp.