This is the highest wattage Marshall ever made I think. 350 watts, haha. It has a tube preamp stage, solid state rectifier, solid state power. It is like two amps in one (only one input) with switching between two totally separate preamp stages. Its true that it does not really do its thing until you are good and loud but we are experimenting with a power soak to make it work in the space better. The metal people liked these. Alex Skolnick from Testament notably owns several of these and knows how to dial the 4 channel selects in with no pedals for his sound. We have two of these.  Why? Long story.... It has a huge loud low end, esp on the Amp II side, and detuned metal and dirge types love it! We have the 6 button footboard too.