Jacktop? Omjack?

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himhimself
Posts: 562
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Jacktop? Omjack?

#1 Post by himhimself » Tue Jun 16, 2020 5:01 pm

Grant Bunter wrote: ↑Mon Jun 01, 2020 10:53 pm
J array? No, I don't think it suits your purpose.
If you eneded up with 2 Otops per side, one of the great things about the Otops is they stack vertically flat (unlike the DR's and the J Array)…
So I built four omnitop jarrays. No regrets, they sound awesome. And I'd like to think that I may grow from two per side to three or four, which would make the J format more useful. I really chose the jarrays because of the lightweight construction. However, looking at the jacklites, they use the same light weight 1/4"-1/8" construction but are rectangular. Any reason the omni's couldn't be built like the jacklites so they would stack vertically flat too?
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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Bill Fitzmaurice
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Joined: Tue May 02, 2006 5:59 pm

Re: Jacktop? Omjack?

#2 Post by Bill Fitzmaurice » Tue Jun 16, 2020 5:12 pm

The JArray are made the way they are specifically to allow them to be splayed in large arrays. That doesn't mean they have to be splayed, that's why the brackets are adjustable. The JackLite aren't recommended for stacking more than two high, so they wouldn't benefit from being able to be splayed.

himhimself
Posts: 562
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Jacktop? Omjack?

#3 Post by himhimself » Wed Jun 17, 2020 8:18 am

Thanks Bill, but I think we are flipped around. I am not thinking to have a JackLite that can be splayed, rather an Otop Jarray without the angled "j" top and bottom. That way if only running two per side, they stack square just like the regular Otops, but you get the benefit of the lightweight construction. So I guess my question is could you use the jarray plans but alter for 90 degree tops and bottoms, and if so, would you simply use the average of the front and back heights?
It wasn't until I looked at Jacklite plans after building my jarrays, seeing the jacklite uses the same lightweight construction but is square, that it got me wondering.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

Bruce Weldy
Posts: 7648
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Jacktop? Omjack?

#4 Post by Bruce Weldy » Wed Jun 17, 2020 9:17 am

So, what you really want is an OTop lite?

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
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."

himhimself
Posts: 562
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Jacktop? Omjack?

#5 Post by himhimself » Wed Jun 17, 2020 1:39 pm

Yeah, that's it! Thanks for elegantly interpreting my twisted thoughts, Bruce :-)
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

jimbo7
Posts: 753
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: Jacktop? Omjack?

#6 Post by jimbo7 » Wed Jun 17, 2020 2:37 pm

So all you have to do is make a couple "I-array" brackets and you're good to go, right?
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
2x T39 24" 3012lf
Simplex 10 BP102

himhimself
Posts: 562
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Jacktop? Omjack?

#7 Post by himhimself » Wed Jun 17, 2020 5:55 pm

Yep. I have the brackets, and they work great for positioning the speakers at various angles. In fact, I just leave each pair bolted up now and move them around that way. A little big and awkward, but 50% less trips to the trailer. However, if they were square, I could just stack them up like regular otops without any brackets. For the most part, with only two per side, that would work fine. And they would store and travel easier too. Just thinking that if I built another set I would do them square.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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