I have a B52 AT100 amp and on the back it has a switch for different ohm selections. I can choose between 4, 8 or 16 ohm and I am currently running it on 4ohm since I only have one 4x12 cab. Can someone explain to me what would be the best setting to run it on and why. I just don't know a whole lot about ohm's. I was told the lower the ohm's the more power you are pushing.