The devil's in the details, isn't it?![]()
We have to use big amps and cabs because none of the shows we play have PA support.
The OP said "we" (meaning those who have big rigs) needed them because of a lack of PA.
There is no logic in that. Drums can only get so loud no matter how hard one hits them (spare me the "You haven't heard my drummer" blather). If one needs a big bass rig to carry the room then so does the drummer. Thus the need for a PA. If there is no need for a PA then the volume requirement for bass goes down as well.
To insist that only the bass player needs to be heard is selfish and a detriment to the band overall.
My point was that if one is going to complain about not having a PA...then buy a PA, not just something that amplifies only you. If a PA isn't needed then don't use one. Duh.