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In Reply to: RE: Division of labor in PA system posted by Duke on February 02, 2011 at 20:45:58
All subs together should be able to play as loud as all mains together.On a budget it would be very hard to beat tapped horn subs.
Head over to diyAudio.com as there are a fair few examples for good subs, specifically the link below might be of interest!
Actually anything contributed by 'jbell' could well be helpful.
PS: Just noticed that dealer thing so you may have to clear that with our own God of Bass tomservo!
Edits: 02/03/11Follow Ups:
Thank you very much.
Portability being a significant issue, tapped horns are not feasible.
Duke
Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.
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.
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.
If money is limited you defintely want to horn load your subs for max output
and less money spent on drivers and cabs
Bill Fitzmaurice can steer you in the right direction for DIY
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