Is it possible to run one of these little jobbies through an effects loop on a Marshall and use it as a master volume for thin walled apartment won't wake the baby or piss off the neighbors levels?
Yes you can try it, won't hurt anything. Some Marshall already come with volume controls for the loop witch can be used as a booster or another master volume.
'When I Don't Have Anything Interesting to Play, I just Play Fast' But then who wants to hear 64 bars full of 32nd-notes except the douche-bag blowing them from the stage.