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In Reply to: RE: Division of labor in PA system posted by Duke on February 03, 2011 at 09:21:56
You really should dig a bit into the thread I linked to!
Portability was the main reason for its inception. The end result weighs around 50lb, uses a $200 driver and one sheet of 8x4 ply. Looking at the measurements I find it hard to believe in the possibility of achieving more from a smaller, lighter or cheaper package of any other design.
Follow Ups:
I did take a look, and it's an impressive design but not really the best solution for this application. The portability issue goes back more to box size than weight; the band has muscle & a dolly, but no big car.
That tapped horn is still pretty big at 9 cubic feet external volume, and I'd need two of them to meet the SPL requirement but would still fall short of the -3 dB at 37 Hz requirement. Ironically a same-size ported box with the same woofer would meet my requirements, but I really need smaller boxes.
I have a suitable subwoofer design worked out, which meets the SPL and bass extension targets in four boxes of considerably less external volume than two of the tapped horns. What I didn't know was whether I needed two, three, or four such subs, and thanks to your earlier post now I know.
Duke
Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.
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