I'm seriously considering ordering either a 2x8 or 3x8. Last I heard these drivers were 8ohms and therefore, the 2x8 was a 4ohm cab and the 3x8 even lower. Since one of these cabs is all I would be able to power, how do they perform volume wise? How do they compare to a typical 8ohm 115 or 112? I assume they're much quieter than say 2 x 112's (the aggie for instance). edit: Oh yeah, how effecient are these cabs?