So I am curious about these kind of boxes. I understand the point and yes the idea of cranked tubes is apealling, but something about doing this just does not feel right. Basically blasting your amp but constricting the signal to the cab. There has got to be negative side effects. What are they. Does is it cook your tubes quicker? Its just seems like it invites damage somewhere, especially when its always in your rig. What do you guys think? If nothing else it would be a great studio tool.