Ah, yes. The bass is always ignored by the other instruments, even though it is much more susceptible to placement than the other instruments! Just because their high frequencies don't suffer from placement, why should yours!

Then, if the place they send you makes you boomy, they just tell you to turn down
!! 
And the guitarist can send his pedalboard, with 50 different effects, to the PA but, no-oOo-o, they want you to send a "direct" signal before any pre-amp so the soundman can set your tone
!!! 
... ... ...
... sorry, ... didn't mean to get on my soapbox.
.