Renegade Parties Vol 2, Bass in the Bowl - AVS Forum
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post #1 of 7 Old 05-20-2012, 07:26 AM - Thread Starter
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There is a bandshell in Rochester called the highland Park bowl:





There also happens to be the Lilac festival commencing today. So we are doing a renegade show at the bowl today. There are 2 20a circuits to use which will be adequate.


The blazer is loaded:



Sub compliment:
1 B&C 21SW152
1 18Sound 21LW1400
4 Sundown SA12

Amps:
1 NE8250
2 KLR3200
1 KLR2000
1 FTX-2001

More pics later. I left the SoloX at home, too heavy and I chose efficiency because of it being outdoors.

 

Originally Posted by Bill Fitzmaurice:
It's also the very sort of Voodoo Engineering that should never be done.

 

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post #2 of 7 Old 05-20-2012, 10:39 AM - Thread Starter
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Got it set up, and RPD shut us down because of no sound permit.

 

Originally Posted by Bill Fitzmaurice:
It's also the very sort of Voodoo Engineering that should never be done.

 

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post #3 of 7 Old 05-20-2012, 12:48 PM
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Well, that sucks!
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post #4 of 7 Old 05-20-2012, 01:39 PM - Thread Starter
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Officer was kind enough to let me take pictures set up, but not take a video. Will post later. The bass up the hill was simply amazing.

 

Originally Posted by Bill Fitzmaurice:
It's also the very sort of Voodoo Engineering that should never be done.

 

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post #5 of 7 Old 05-20-2012, 04:39 PM
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post #6 of 7 Old 05-20-2012, 08:32 PM - Thread Starter
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For the 10 minutes it ran, it was epic. I really wish they would have let me take the video.

 

Originally Posted by Bill Fitzmaurice:
It's also the very sort of Voodoo Engineering that should never be done.

 

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post #7 of 7 Old 05-21-2012, 10:25 AM
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Pretty cool rig

If you ever have the opportunity to go back there again, I'd recommend utilizing the rear curved wall in a more optimized manner. Hard to tell from the pics, however boundary cancellation could easily eat up a significant amount of your capability in the 35hz-45hz range. If there was a way to load the acoustic output of the subs as directly to the rear wall as possible you may have much less 1/4 wavelength destructive cancellation.

I'm sure the LF was bad ass, but if you eliminated the negative acoustic elements, it could be spectacular, much smoother response, and more efficient. If the subs are say 8 feet off the back wall, you're going to have a cancellation center approximately at 35hz. A spacing of 7 feet, 40hz, a 6' space, 47hz. So best practice would be keep them quite close, or quite distant. The range between 10' to 3' is problematic.


As you know;
1130/freq=wavelength in feet

So, if a sub is 1/4 wavelength away from a wall (especially outside because the boundaries are simple, and well defined), you'll encounter cancellation at that frequency.

Here's one article pertaining to this.



Best of luck


just found another link here

------------------------------------
Flat, Deep, Clean, Linear, and Loud
------------------------------------
Active 16.8kw, 7.3 system
(3)Seaton Cat12C up front, (4)QSC K8 sides/rears
(2)Seaton SubM-HP, (4)18" IB
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