I have a band, so we need some noise.
I practice my drums in there. I have my computer hooked up there so I can get it loud enough to hear if I want to play along with something.
The amp head you see in the picture pushed 600 watts. I have another head that does like 800, for when I want to bi-amp it with a crossover. There's other things I have that I don't leave set up in the living room... like a compressor, subs, etc...
It's really cool to play madden nfl with, though..