OT12 Build

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Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

OT12 Build

#1 Post by Bruce Weldy »

I bought my first two OT12s this time last year to go with the T39s I built. Well, it's time to build a pair.

I'm going to give the piezos a try this time.....still a little leery, but I've heard enough from you guys using them for live music that I'm ready to give it a go.

Starting with 5 sheets of 5x5 baltic birch ($22/sheet in San Antonio). 5 sheets? Yep, I'm building 3 WH10s when the OTops are done. Thanks to the heads-up from Leland about the speaker prices, I was able to buy the 2512s and 2510s at the old price.
OT12 Build 001 small.JPG
Got the panels all cut. Headed out now to finish the baffles.
OT12 Build 003 small.JPG
Last edited by Bruce Weldy on Thu Apr 14, 2011 7:53 pm, edited 1 time in total.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#2 Post by Bruce Weldy »

Here's how I made the phase plugs round....
OT12 040911 small.JPG
If I'd known how time consuming the baffles were, I might have bought 'em from Leland.
OT12 2 040911 small.JPG
Last edited by Bruce Weldy on Thu Apr 14, 2011 7:53 pm, edited 1 time in total.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

ripNdeb
Posts: 512
Joined: Fri Sep 24, 2010 4:57 pm
Location: Eureka, CA
Contact:

Re: OT12 Build

#3 Post by ripNdeb »

Bruce Weldy wrote: If I'd know how time consuming the baffles were, I might have bought 'em from Leland.
Wait 'till you get to the tweeters :twisted:
2X OTop 112, 3012HO, melded - 2X T39, 27", Lab 12 - XF 212 - 4 DR250, 2 melded, 2 straight
2 20" T39 3012LF - WH10 - WH8 - in the shop - 2 more 20" T39s
http://saltandlighteureka.org still need a trailer :)

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#4 Post by Bruce Weldy »

ripNdeb wrote:
Bruce Weldy wrote: If I'd know how time consuming the baffles were, I might have bought 'em from Leland.
Wait 'till you get to the tweeters :twisted:
yeah, I can't wait to saw plastic.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Tom Smit
Posts: 7595
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: OT12 Build

#5 Post by Tom Smit »

ripNdeb wrote:
Bruce Weldy wrote: If I'd know how time consuming the baffles were, I might have bought 'em from Leland.
Wait 'till you get to the tweeters :twisted:
Don't forget though, it's your labour that gives you top SQ cabs for the cheap. :D


Build on!
TomS

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LelandCrooks
Posts: 7242
Joined: Thu May 04, 2006 9:36 am
Location: Midwest/Kansas/Speaker Nirvana
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Re: OT12 Build

#6 Post by LelandCrooks »

Whiners. I spent 8hrs yesterday cutting and gluing piezos. Let the soldering begin. :owned:
If it's too loud, you're even older than me! Like me.
http://www.speakerhardware.com

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loudsubz
Posts: 389
Joined: Tue Dec 28, 2010 8:13 pm
Location: Mississauga, Ontario, Canada

Re: OT12 Build

#7 Post by loudsubz »

I love soldering !

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#8 Post by Bruce Weldy »

Parts came today from Leland. Start getting PL all over me tomorrow.

Two OT12s ready for glue.....
OT12 Build 018 small.JPG
Next up are these 3 Wedgehorn10s....
OT12 Build 017 small.JPG

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build - more pics

#9 Post by Bruce Weldy »

Started putting 'em together today...

Painted the baffles first and decided it would be a pain to put the phase plug extensions later as well as the spacer ring..
OT12 Build 019 small.JPG
OT12 Build 020 small.JPG

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#10 Post by Bruce Weldy »

Been bothered about how to get a tophat in the cab with the reflectors.....old style wasn't a problem, but this is going to protrude through the reflector.

So, I went ahead and cut the hole in the bottom panel.
OT12 Build 021 small.JPG
Then I cut the reflector panel for the tophat. Took some trial and error to get the first one right. Second one went real quick when I figured out just what the shape should be. The oscillating sander made quick work of ploughing out the backside.
OT12 Build 022 small.JPG
OT12 Build 023 small.JPG
OT12 Build 024 small.JPG

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#11 Post by Bruce Weldy »

Here's how far I got today.....should have both of them finished as far as the boxes tomorrow.....then comes speakers, crossover, paint.......
OT12 Build 025 small.JPG
OT12 Build 026 small.JPG

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

dcodym
Posts: 51
Joined: Sat Mar 12, 2011 8:12 am
Location: Dhahran, Saudi Arabia
Contact:

Re: OT12 Build

#12 Post by dcodym »

Looking good. I like how you put the screen on the baffle. I just cut my baffle last night and I've been thinking about attaching the metal grille - the stucco lathing. I'm going to use a full grille, so I know it isn't necessary, but I thought that it wouldn't hurt. I can remove the full grille later, but I can't go back and attach the lathing. I want to have the option there, just in case.

What you did with the screen, though, gives me the option of having extra protection there for later if I decide to not go with the full grille or if I decide to remove it, but also saves me the trouble of having to search our stucco lathing here in Saudi Arabia and then also of having to make the adjustments in my cutting and such.

Thanks.

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#13 Post by Bruce Weldy »

dcodym wrote:Looking good. I like how you put the screen on the baffle. I just cut my baffle last night and I've been thinking about attaching the metal grille - the stucco lathing. I'm going to use a full grille, so I know it isn't necessary, but I thought that it wouldn't hurt. I can remove the full grille later, but I can't go back and attach the lathing. I want to have the option there, just in case.

What you did with the screen, though, gives me the option of having extra protection there for later if I decide to not go with the full grille or if I decide to remove it, but also saves me the trouble of having to search our stucco lathing here in Saudi Arabia and then also of having to make the adjustments in my cutting and such.

Thanks.
The screen on the baffle is the pet screen that Leland puts in the kits. Just cut it with scissors. I put it on after the braces. I didn't want to braces to sit on it and I didn't want to compensate for the height. So I just cut a little slot in each side of the screen for the braces and used staples to stretch it tight.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 8585
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OT12 Build

#14 Post by Bruce Weldy »

dcodym wrote:Looking good. I like how you put the screen on the baffle. I just cut my baffle last night and I've been thinking about attaching the metal grille - the stucco lathing. I'm going to use a full grille, so I know it isn't necessary, but I thought that it wouldn't hurt. I can remove the full grille later, but I can't go back and attach the lathing. I want to have the option there, just in case.

What you did with the screen, though, gives me the option of having extra protection there for later if I decide to not go with the full grille or if I decide to remove it, but also saves me the trouble of having to search our stucco lathing here in Saudi Arabia and then also of having to make the adjustments in my cutting and such.

Thanks.
Here's a closer look at how it's attached....
OT12 Build 027 small.JPG

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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AntonZ
Posts: 2689
Joined: Sun May 14, 2006 6:00 am
Location: NL

Re: OT12 Build

#15 Post by AntonZ »

I had some screen in a cab I built, different model, but it was in a somewhat similar position. Turned out the moving air made it slap against the wood, in your case where the phase plug sits. That made my cab sound nasty. You may want to add some extra staples around all openings in the baffle to prevent it from hitting into the wood. YMMV, my screen was not as solid as pet screen (which is not available here).

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