Hi , I did send you a PM but the Dbx PA has "custom" option for the speakers and the amp selection.  The instructions do a good job showing you how to set up the mixer and amps and speakers.  Once you do the automatic EQ of the speakers and set them to flat you are done and never have to do it again.  .I used the indoor proceedure for mine.  You do need a RTA mic, I bought a beheringer 4000 ( i think ) for $46  the DBX mic is $100.  after you finish using the setup wizard you save it.  The when you go to a gig you just run the automatic feed back option and you are ready to roll.  You just EQ for your personal taiste and the systom will sound as good as it can.  The Dbx also sets up cross overs and limiters for your subs. and much more. I have a Beheringer mixer 1222, QSC GX5, Dbx rackgear PA, and DIY speakers designed by billfitzmaurice.net.  These speakers are nothing short of amazing and compaired to my old brand name PA cabs there is no comparison.   Go to the web site, my build with pictures is there under DR 250 and T39.  ( my tops and subs). Good forum of infomation on speakers if you are a DIYer. .This kind of a PA system with the X3 is just a killer system that will out perform the wall of amps and cabs that we used to use. It is cheaper, lighter and sets up fast and will give you more consistant sounds than trying to ballance individual pieces of equipment.  Plus your sound will be consistant in every corner of your venue.  Good luck  Phil

Ya it sounds a little confusing.  When you run through the wizard you will chose a mono system,  2 subs and  2 tops and you don't have to mess with bi amped speakers settings.  Your tops are full range and when you run throu the wizard it set that up and you don't have to do a thing.  If your  tops had different inputs for high and lows, you could  bi amp them and feed the horns and speakers seperatly but since you don't have that you don't have to mess with it.   The instructions give you every option for set up from very complicated to a simple rock and roll set up and I think it is  preset 3 or maybe  5 and I think that would fit your system.  The system has compressores and delays and many things you probably won't need.

If you are going to use your PA for just vocals you may not need the Dbx set up but it is very nice for feed back control and to get you speaker EQ to a flat setting.  ,   if you going to feed your X3 through it I think it might be a real assetto get the sound just like you want.

I have been through  the wall of amps from my playing back in the late 60 and 70's. and killed my ears with the volume we used.  And the sound was always spotty, sometimes it is the location but usually it was the limits of the amps and speakers we were using.

We now use a mixer, the Dbx, 2 compression subs (could use 4 for outdoors) and two full range tops ( folded horn type). This system is good for crowds up to 200- 300 people  We get 106 db at 3 feet from the system at max settings and it is crystal clear.  Vocals are right on top and lows are in the subs out front, and; the drums, organ and 4-5 mic all have wonderful separation.  I use a QSC GX 5  500watts.  I do run alittle chorus and just a smell of reverb through the vocals for some additional debth.  Nothing weighs more that 50# each.  If we used the old school set up  we would need at least three amps of 500 watts individual cabs for each instrament and the list goes on.

By setting up using every thing through the PA you still have the same volume without the hassel.  So consider a good PA, Speakers are the most important,  amps not so much just make sure you have enough head room in your amp to fully power your speakers.  Eg:  If you run you systam and get 100db out put ,( thats the point where you start killing your hearing) and want to double the precieved volume you need to go from 100db to 110db  (very painfull volume).  Volume doubles with every 10 db increase.  So increasing your output just 2 or 3 db is a significant increase in volume.  So when you want to make your system louder, just add more speakers to it.  Make sure your amp or amps are big enough to run them. If you over drive your cabs they really don't get much louder they  just get fuzzy and lose their clarity.

The best thing is to start with the PA system and if you don't like it you just start adding the wall of sound, but you still need the PA any way so you have not waisted the money on a PA .

Hope that helps.

PS  If you are still in doubts buy the unit from Guitar center or musician friend and they have an excellent return policy.  Try it for 30 days and return it if it doesn't work for you.

Good Luck  Phil