So I have a 100W amp driving one 12-inch speaker at 100 watts peak. If I have a 100W Marshall head driving a 4x12 cab, does that mean each speaker is being driven at 25W each? Can I take my amp and plug it into a 4x12 cabinet and still wind up with the same volume? Better yet, since my amp is capable of driving both 100W outputs at once, could I use it to drive two 4x12 cabs? If I were to build the cabs, would I have to wire the speakers in series? Or in two pairs in series and both pairs in parallel?