Some thoughts and concerns, from someone that's been doing PA systems for a while:
- Ribbons don't like to be driven low or loud. The 1000w 200ms peak is something that the driver might (might) survive once. Or twice. The 60w continuous rating should be respected.
- You're going to need more than a pair of 12" midbass drivers to do the kick drum any justice, especially for the audience size you're talking about.
- The Crown amp you've chosen will leave performance on the table. If it was mine, I'd be looking for something that'd do >600w into 8ohm.
It's difficult for me to understand how you can confidently come up with all these specifications for your crossover, while being unable to design a crossover.
It seems to me like you need a consultant. Where are you located?
I have some ideas on what would make your speakers work well, but they are contrary to some of your ideas.
This is a job that'd take a few days to pull off well. First day would be spent with a measurement mic (and the cabinets built, with the drivers installed), and then perhaps half a day designing the crossover, and then order parts, and then build, test, and EQ the thing.
Studio-perfect sound can be achieved from a PA system. Mine usually do a pretty good job.
Chris
PS - On a different note, the best PA system in the world will sound pretty mediocre if your microphones etc aren't up to scratch.
Well, that is all like that... but, if I decided to give drums a real ¨field day¨, I would use a pair or two pairs of my bass horns, that are 1x15¨ bass horns, that go from 38 Hz low cut-off frequency to about 200 plus Hz! I have 16 of those bass horns - my own design, awesome. So, I got the ¨toys¨ for that kind of performance that you describe, but these two PA speakers, 2-way units consisting of 1x12¨and 1x ribbon H.F. are for more MODEST approach to playing in clubs, not very loud at all. If I would go loud, I would use these two speakers above 200 Hz, and my bass horns below 200 Hz, of course.
As for ribbons, yes, I agree, one must watch out... well, with sensitivity of about 107 dB/1W/1m, I really do not need to put more than 100 Watts on them, to make 107 plus 20 - equals 127 dB, which is much more than I ever need for a peak in a club where DIRECT FIELD is not longer than 10 meters (33 feet)! So, those ribbons are not going to get more than 100 Watts on them, peak, or a max. of 200 Watts (that is 23 dB, which combined with the above sensitivity makes a WHOPPING 130 dB!). So, do not worry about blowing H.F. units. But, just for the info, they ARE tested at 200 msec (ten times the industry standard of 20 ms for peak power!) to be capable of getting 1000 W. Well, as I stated, I do not need anything even remotely close to that, ever! THANKS FOR YOUR CONCERN AND KIND ADVICE!