If I have a head that is 500w at 4ohm and 250w at 8ohm and 2 cabs that are rated 300w at 8ohm. Is this ok? Optimal? How should I hook them up? Series correct? Any other pointers or places to go to better understand the whole thing would be greatly appreciated. For reference I have a hartke LH500 head. A hartke hydrive 210 cab and a Phil Jones Bass Cab 47 on the way. The Phil Jones has 2 connectors a xlr input and a xlr link.