I know the master volume goes from bedroom volume at 10% to full on stadium volume at 10.36%. If they'd have a better mv pot it would've been easier. I have a 45 and 80 and HAD to run my 45 through my Rock Crusher, otherwise it was unbearable.
I almost blew up a nice old Marshall 4x10 playing a Superdrive 80 through it when I worked at Guitar Center like 18 years ago.