I have 2- JBL MPro 418s Subwoofers. I busted one a while back and I have to replace it now due to some upcoming events... They had the original JBL 2241gpl drivers in them however I'm looking into replacing them with Eminence 18" Omega Pro-18C Drivers hoping to get a little more out of them... Will this help?
No, the Omega is a downgrade from the 2241.. get your JBL reconed for that and all the reasons stated above.
I will be using 2 Crown XLS1000 Power Amps Bridged to push the subs (one per sub) 700 Watts at 8 Ohms, 1,100 Watts at 4 Ohms. Crossover anywhere from 50-90 Hz.
50hz? These subs don't produce a lot below 50hz so why would you cross them so low?
If this helps mains are 2 EV ELX112s powered by a Crown XLS1500 crossed over at 250 Hz as well as 2 EV ELX112 delay fills about 60 feet out form the mains powered by a Crown XLS1500 Bypass Crossover.
250Hz? Really? If the subs are crossed at 90hz max what is covering everything between 90 and 250hz?
Mostly live bands ( anything from acoustic sets to full bands) every now and then CD type music. Room is a 100x150 1200 soul max capacity event venue but usually only have around 500 people in attendance.
I guess it depends upon the type of music but your system appears to be a fair bit undersized for a venue that size. If you are blowing drivers that's also a good indication you don't have enough rig for the gig, and instead of trying to get more from the gear you have with more amp power it's better to add more drivers and amplifiers(for subs in particular), and keep the applied power more modest.. everything will last longer and sound better.