Ok, I need some help because I am baffled on this. I understand the rules in calculating ohms when wiring speakers in cabinets but I just stumbled on something that has me confused. I have 2 cabinets that are loaded with the same speakers, 1 is a 4x10 and the other is a 2x10. Both contain speakers that are rated at 200watts & 8ohms. The 2x10 is wired parallel and has a 4ohm load and the 4x10 is wired parallel/series and has an 8ohm load. However (THIS IS THE PART THAT STUMPS ME) the 4x10 is rated as a 600 watt cabinet and the 2x10 as a 400 watt cabinet. So does the wiring scheme change the total wattage and what is the math (if 2 200 watt speakers in parallel = 400 watts then why do 2 'sets' of those in parallel not equal 800 watts -- you see my confusion)? Thanks to anyone who can explain this to me.