David
Ex Member
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ok not sure if im reading that right but did you say that you want to build 10 2X18" WO's per side? so thats 20 all up? and just to service 1500 people? well i think it sounds like fun but a little impracticle. Firstly it will be overkill, you do not need that many enclosure to service 1500 people. Going by the industry rule of thumb of about 10 watts per head, 15,000 watts will be plenty to cater for any application of 1500 people. So considering that you always want twice as much power goin to your subs as your mid/highs, that would mean 10 enclosures rated at 1000watts RMS. Dont bother with the 2X18" design, its just not worth the huge amount of extra materials, money and effort. Best option is to go for 2X12" WO, you will get much tighter bass, and it doesnt take ten men to lift one box either. Build 10 of these, rated at 1000watts RMS. Place 3, one on top of the other, per side at your main stacks. This will give you greater coupling, therefore better frequency response and higher SPL. Then run delay stacks 35meters in front of your main stacks with another two per side, again one on top of the other. Delay these stacks by 10 milliseconds so you dont get phasing problems. You will get far better dispersion and throw, and your 1500 people will have better sound and imaging, also more fun to mix. This way you will only need two stereo amps to run all your subs, you will need to do some series and parellel wiring in your main stacks to get back to four ohms, and you can pick up 3000watt a side at 4ohm amps for pretty chaep these days. Hope this gave you some help. Cheers David
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