So I'm almost ready to start recording full scale bands but I still have one problem. I will be recording in my basement of my house. I have a room inside a room for the drums, and it is definitely possible to play and not disturb the people in the house. However, I like to record bands playing together so I'm presented with a problem. I need to build some type of isobox for the guitarist's amp. Now is there any "golden" size I should make this? I have been googling it earlier and it seems that it wouldn't matter too much since I will be close micing most of the time. So if there isn't really any problem just making a box, what materials would you guys suggest, sizes, thickness, all of that jazz?