Hi, just wondering if a single 4ohm 4x10 cab would sound better/louder than an 8ohm 4x10 cab if they're both being pushed to the limit. Or does it matter? I have an Ampeg SVT 7 Pro head that puts out 1000 watts @4ohms, and 600 watts @8ohms. It has enough headroom to push my 8ohm 4x10 cab to the...