I am sorry because I should understand this already by reading through these boards and I have read every sticky'd topic that looks like it would have this info and I just don't quite understand. I am looking to getting my first real rig and right now looking at a 450w 4ohm head and a SWR workingmans 4x10t used. As far as I can tell the cab is rated for 400w and 8 ohms and I just wanted to know if that means it will be getting roughly 225ish watts coming through the speaker because it is 8 ohms or will the full 450 watts still be going through? I just don't want to buy this setup and blow the speakers cranking it up too much so I know if I have to hold back at all even though I know I will probably never have it cranked all the way I want to be sure. I plan to eventually add another cab likely a 15" 8 ohm and know that I am ok with two 8 ohm cabs with a 4 ohm head but I am not sure if there is anything that would change with the first cab when I plug in the second. Again I am sorry for asking this but I have been trying to get a definite answer on this exact situation and can't figure it out so thanks for any answers.