Sound System Setup

Combining subs, tops and all the rest of your kit.
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TeknoPouf
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Sound System Setup

#1 Post by TeknoPouf » Fri Mar 01, 2019 8:10 am

Hello I would to have an opinion on this Stack, the use is for a sound system outside, the manikin is placed at 3 10 and 23m :hyper:

12 Tuba60 with 6 DR300
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Bill Fitzmaurice
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Re: Sound System Setup

#2 Post by Bill Fitzmaurice » Fri Mar 01, 2019 8:34 am

That may not be the worst possible way to place DR300s, but it's a contender.
http://www.gtaust.com/filter/05/07.shtml
http://www.gtaust.com/filter/06/08.shtml

TeknoPouf
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Re: Sound System Setup

#3 Post by TeknoPouf » Fri Mar 01, 2019 9:04 am

The positioning of the Drs and a rotation of 30 ° on the right and on the left and an inclination of about 10-15 ° forward, if that and a bad placement how would you position them? Otherwise at the level of the Sub the height of the 12 tuba and 2m28 and I wanted to know if it was not too high and if it was ok to have bass above the face?

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Bill Fitzmaurice
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Re: Sound System Setup

#4 Post by Bill Fitzmaurice » Fri Mar 01, 2019 9:16 am

Read the links. DR300 is a line array speaker.

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Bill Fitzmaurice
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Re: Sound System Setup

#5 Post by Bill Fitzmaurice » Sat Mar 02, 2019 9:29 am

For reference this is what a stack of six DR300 would look like. I'd use this for concert sound with a minimum audience depth of 75 meters, maximum 150 meters. With a stack of this size to either side of the stage the minimum audience size would be 2,500, the maximum 5,000.

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TeknoPouf
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Re: Sound System Setup

#6 Post by TeknoPouf » Mon Mar 04, 2019 7:11 pm

I cancel the rotation and disconnect the 2 drs from the center to let 2 Dr left and right, I also replace the 4 Tuba60 Dual 12 and put Simple 12 instead, with Simple in 15 "the height of the Sub is 1m90 and with simple in 20 "it gives a height of 2m03 we incline the Dr a little forward so that the sound not passes above and shines on the stage
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TeknoPouf
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Re: Sound System Setup

#7 Post by TeknoPouf » Mon Mar 04, 2019 7:15 pm

At this moment, the configuration seems good? I would like to know also the best height of Sub according to you 1m90 or 2m03, the configuration of the first image and 2m28

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Bill Fitzmaurice
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Re: Sound System Setup

#8 Post by Bill Fitzmaurice » Mon Mar 04, 2019 9:50 pm

Once again, read the links. That is not how line array speakers are placed. For that matter no speaker works well splayed like that. It's the reason why the line array was invented.

CoronaOperator
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Re: Sound System Setup

#9 Post by CoronaOperator » Mon Mar 04, 2019 10:17 pm

Watch this video from 4:30 - 5:30:
https://www.youtube.com/watch?v=Iuv6hY6zsd0&t=

Sound works the same way. When you splay the speakers you create an interference pattern. That pattern of peaks and nulls changes with frequency. This is called comb filtering and occurs wherever 2 identical sound sources overlap each other.


Sanstitre.jpg
In the above graph, if the blue trace is 1 speaker playing, then when you add another speaker beside it, you will get the red graph wherever they overlap. Notice the huge dips in the frequency response all over the place.

When you use a line array, the continuous line acts as one long unbroken source so you don't get that interference pattern.
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience

Grant Bunter
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Re: Sound System Setup

#10 Post by Grant Bunter » Tue Mar 05, 2019 1:30 am

TeknoPouf wrote:
Mon Mar 04, 2019 7:15 pm
At this moment, the configuration seems good? I would like to know also the best height of Sub according to you 1m90 or 2m03, the configuration of the first image and 2m28
Hello,
1.I think english is not your first language, where are you from?

2. Dual loaded 12" drivers will have greater output than a single 15" driver in the T60.

Deciding how big to make a T60 is your decision.
You make that decision based on pack space and crew size (A T60 is like a refrigerator in size).

Deciding how wide to make a T60 will determine maximum output for any single cab. Build as wide as the plans say for maximum output.

3. The worst place to put any tops/mains box is on top of the subs.

The bottom of the lowermost top/main box in a stack should be at say 6 feet or 1.8m above the ground...
Built:
DR 250: x 2 (melded array) with March 2012 plans. 2 more under way with CD horn
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

TeknoPouf
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Re: Sound System Setup

#11 Post by TeknoPouf » Thu Mar 07, 2019 5:22 pm

And like that ?
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Bill Fitzmaurice
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Re: Sound System Setup

#12 Post by Bill Fitzmaurice » Thu Mar 07, 2019 5:47 pm

No. Like this:

Image

jimbo7
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Location: St. Louis

Re: Sound System Setup

#13 Post by jimbo7 » Thu Mar 07, 2019 8:15 pm

Image
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods

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