Will 2x10 + 2x10 be enough? (With yamaha bbt 500h) This 2x10 cabs has very low bottom and are got a very clear tone. (Its the Yamaha bbt 500 cabs). Before I wanted to add1x15, but now I will buy 2x10 instead. (I like the punchyness of the 10"s) But will totally 4 10"s do the job? At bigger places there are always PA systems so I can Line out the signal from the amp. But do I really need bigger rig? I do belive 4x10 is enough, but I don't know. Any opinions?