12x8 BFM system
- Paul Norman
- Posts: 115
- Joined: Fri Jan 11, 2008 11:06 am
- Location: IA.
- Contact:
12x8 BFM system
Here are some pics of last Sat. nite. Had 3 bands in six hours with out a hitch. All bands were very happy with the sound. The client was very pleased saying " It's loud and sounds clear but we can still talk." Just what you wanna hear.
I was running about a 100db at FOH 100ft. from stage. I've done 14 of these outdoor shows this summer with 3 to go and this system works great. Everyone comments on the clarity and when they find out I built it they are really suprised. The last 4 shows I've been running the top 2 box on each side with a aux feed mix for vocals only with a seperate EQ. It really helps bring out the vocals in the mix. The first pic is 8 across the front of stage from a different show which I've done with six also. I can't tell the differance between 6 and 8. I think the spread is to far for 8. Cancellation? 
- Bill Fitzmaurice
- Site Admin
- Posts: 28982
- Joined: Tue May 02, 2006 5:59 pm
Re: 12x8 BFM system
With the subs all mouth to mouth they essentially operate as one, so cancellation isn't a problem, though dispersion may, or may not, be. That wide a source will give narrowed dispersion above the 1 wavelength dimension, but in outdoor venues especially that may not necessarily be a bad thing.Paul Norman wrote: I think the spread is to far for 8. Cancellation?
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bgavin
- Posts: 5738
- Joined: Thu May 04, 2006 10:58 am
- Location: Sacramento, Moderator/Licensed BF Builder
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Re: 12x8 BFM system
Tell us about the boxes and what is in them.
My biggest worry is that when I'm dead and gone, my wife will sell my toys for what I said I paid for them.
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Adam Schaible
- Posts: 317
- Joined: Sun May 24, 2009 9:02 am
- Location: Cincinnati, Ohio
Re: 12x8 BFM system
A lot like the dual PA system. I have always liked this approach better than trying to patch two mixers, etc.
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gdougherty
- Posts: 2623
- Joined: Sun Jan 28, 2007 11:13 am
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Re: 12x8 BFM system
It's a little older, but I'm guessing things haven't changed too much besides the addition of more boxes.bgavin wrote:Tell us about the boxes and what is in them.
http://billfitzmaurice.net/phpBB3/viewt ... 976#p56976
- Paul Norman
- Posts: 115
- Joined: Fri Jan 11, 2008 11:06 am
- Location: IA.
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Re: 12x8 BFM system
The subs are 27" with 3015LF's. The mains are OT112's with 2512's, 10 with 6 piezo's, 2 with 12 melded with pole pockets. The grills are stretched metal with 1/4" A/C foam. Everything is right from the plans-That's way they work so good!bgavin wrote:Tell us about the boxes and what is in them.
:iitp:
(I always wanted to put that up.)
Re: 12x8 BFM system
Paul, your located in Iowa? I'm in the Cedar Rapids area, I would like to catch your system in action someday. Any future plans coming up near the eastern side?
JH
JH
Built:
2 Jack 10, DLII 2510
1 T39, 20" S2012
2 x Autotuba, MCM
2 Jack 10, DLII 2510
1 T39, 20" S2012
2 x Autotuba, MCM
Re: 12x8 BFM system
Paul,
Do you own that stage?
Do you own that stage?
" Everyone Has a Photographic Memory, Just Not Everyone Has Film In The Camera"
4 x T48 24.5" 3015LF
8 x 112 Otops
NEXT 2 x DR280's
4 x T48 24.5" 3015LF
8 x 112 Otops
NEXT 2 x DR280's
Re: 12x8 BFM system
Very nice rig Paul!
Ever since I replaced sex with food I cant even get into my own pants!
- bitSmasher
- Posts: 628
- Joined: Fri May 30, 2008 2:55 am
- Location: Sydney, Aus.
Re: 12x8 BFM system
Hmm, would love to have a rig like that to blast out some nasty electronic music. One day... one day...
Just to make me jealous, what's it like when run hard?
Just to make me jealous, what's it like when run hard?
- djohnson573
- Posts: 324
- Joined: Tue Oct 28, 2008 7:41 am
- Location: Florida
Re: 12x8 BFM system
Paul, how did you secure ther Otops? Are they simply stacked?
Dennis
Built/Own:
- 4 x Titan 39 (14"W) BP102 loaded
- 2 x TLAH
- 4 x OT12 Deltalite 2512 loaded
On Deck:
- 3 Auto Tubas
Built/Own:
- 4 x Titan 39 (14"W) BP102 loaded
- 2 x TLAH
- 4 x OT12 Deltalite 2512 loaded
On Deck:
- 3 Auto Tubas
- Paul Norman
- Posts: 115
- Joined: Fri Jan 11, 2008 11:06 am
- Location: IA.
- Contact:
Re: 12x8 BFM system
No, it belongs to the city. I've done about 10 shows on it. This is the stage I'm considering toJames R wrote:Paul,
Do you own that stage?
buy.
They have locking corners and are just stacked. Sometimes I will stap them all together.djohnson573 wrote:Paul, how did you secure ther Otops? Are they simply stacked?
SWEET!bitSmasher wrote:what's it like when run hard?
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bgavin
- Posts: 5738
- Joined: Thu May 04, 2006 10:58 am
- Location: Sacramento, Moderator/Licensed BF Builder
- Contact:
Re: 12x8 BFM system
Paul, do you see any stability advantages to using three OT212 instead of six OT112?
Second question: do you have any idea how much SPL and distance at war volume?
Your system is the very upper limit of my trailer limits.
Four T48 and six OT212.
Doubling those numbers to 8x12 is only a 3dB gain overall, so pointless for my situation.
Last question: clarity at war volume.
Second question: do you have any idea how much SPL and distance at war volume?
Your system is the very upper limit of my trailer limits.
Four T48 and six OT212.
Doubling those numbers to 8x12 is only a 3dB gain overall, so pointless for my situation.
Last question: clarity at war volume.
My biggest worry is that when I'm dead and gone, my wife will sell my toys for what I said I paid for them.