I was wondering if there is anything wrong with under powering cabs. So one had told me there is but I don't buy it. I'm think of buying a Aggie GS212 from a friend. It's 600w @ 4ohms, I'm only going to be able to push 400w to it. (only other 4ohm option is the full 900w to it). On a side note Aggie GS212 vs Avatar B210?