I'm new to the head/cab world, so I have become curious. Why are 10" and 15" cab systems so prevalent? Why aren't 12"'s used more often? My combo is a 1X12", and I think it's a great compromise between low end and punch. Is it because players that go with a head/cab setup are generally less likely to compromise on sound? Just curious... KampKomfort p.s. Great forum! I've learned so much in the last few days.