Hey guys, im a total noob when it comes to this because I have never had to deal with this many watts before. I have a Hughes and Kettner Cab 4x12 thats rated at 200 watts overall, it functions on all speakers at 4 ohms and two speakers at 8 ohms. the V2 is rated at 400W @ 4 Ohms, 280W @ 8 Ohms, 500W@2 Ohms. How should I set it?