My current pa consists of a pair of powered 1x12 tops and a powered 1x18 sub. In some boomy rooms the sub is hurting as much as helping and even though it is a fairly resonable move (jbl prx618s-xlf), it still isn't fun. The bass and guitar are carried 90% by our own amps and just alittle goes into the pa to get some clarity above peoples heads. Sometimes the drums are starting to use too much of the tops power. I have a pair of jbl prx635 powered cabs that are pretty flat down to 50hz. I was thinking about running only drums through these, set on the floor and then only running vocals or just alittle of the bass and guitar through the tops. I think that this could work, has anyone done anything like this? I have a driverack that I can use to set individual filters and eq's for each set of speakers. I'd run the drums panned hard right and everything going to the tops panned hard left.