While you may not b e able to afford it initially, its my strong opinion than everyone who is building a line array plan on putting in multiple power amps with electronic crossovers. You can do this this way via ebay: a Rane or DOD 2 way analog cross for about $75, a small 40-60 w/ch amp for about $60, a medium 150 w/ch amp for about $100, and a preamp for about $100. Total cost: $335 + shipping.As an example, I had some people over two nights ago to listen to music. They brought their own CD's. One brought a CD of the Paul Winters Group which was one of his American Indian theme type albums. It has a pretty heavy bass drumming to it. She has a decent speaker system at home. But she commented that she'd never heard the vocals before except as something distant and far away. That's how she thought the album was.
In her system, the intensity of the bass took all the power away from the mid range and tweeters on this album. In my system the woofers, tweeters, mid ranges are completely separate.
Just my opinion.