So I got a new Jet City 50 combo amp just over a week ago, and I've noticed the sound cuts through a hell of a lot more than my old Spider IV (though, I was expecting it to do this, and I'm glad it does). I play upstairs, and the sound filters straight downstairs, which annoys my family while they're watching TV.

Would an amp stand help reduce the amount of sound that goes downstairs?
Yes, it would make a big difference. You could also put on casters but that's extra work (though your back will thank you in the future if you do).
Thanks! How difficult are the casters to fit (and is it possible to do damage while installing them)?