Just got my 400+ yesterday. This thing sounds much better to me than my SVT did. It seems to be much tighter too. Maybe couse the master vol. Anyway, I am a little confused with the speaker output jacks. There are 2+1 above on the 4 ohm side, and same for 8 ohm side. I used 2 8 ohm cabs and daisy'd them into one of the 4 ohm jacks and it worked fine. But is the top one for 2x4ohm dais cabs for a 2 load? If so, is the upper on the 8ohm side for 2x8ohm for a 4 ohm load? Are the bottom jacks for running 2 single cabs that are equipped with only 1 jack? I just want to make sure that I don't screw anything up. Thanks, Bob.