Man, mine was really loud and didn’t get dirty until it was brutally loud so i used a fuzz which I’d normally do anyway....I have an OR 80 which is a bit better in that area...I have a 70’s GT120 Matamp that was like that OR 120, so I had it modded w a master volume and I don’t regret it one...
I've tightened them with a wrench before a gig and had the nuts come loose during a gig. They were installed properly. I do use a thick leather strap though. Now I put locktite on the nuts during installation and that resolves the issue.
Some older amps don't need them, but my vintage orange amps do. They were not designed to be run at modern US wall voltages and need to be run at around 106-8 volts. I measured my jam room at over 122 volts. I use a variable power transformer to step them down. I don't have an expensive one but...
I like a lot of styles but def gravitate towards loud stonery Doomy stuff. I mix in psychedelic and bluesy/prog stuff too. Set my amps clean generally and step on my fuzz pedal for heavyness !