Coupling on a budget, omnitop15

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Camillo
Posts: 64
Joined: Wed Apr 27, 2022 1:02 pm
Location: Sweden

Coupling on a budget, omnitop15

#1 Post by Camillo »

Hi!
Built two OmniTops 15, planning on building two more in the future for coupling. Now the budget isnt enough for a new tweeter section. Is it worth to couple 2+2 with the Lf-section only?

Everything is active crossovered bi-amped.
I was thinking about having to change the hf-section to parallell to match the lf sensitivity but thinking again, i dont have to since the lf section will be 4 ohms so the sensitivity should match with two more lf cabs in parallell lowers it down to 4 ohms? (or is it +6db/extra cab, and -3db from halfing the wattage/lf-speaker in parallell?)

Or.. Would the most correct option be to use three amps and use two for the hf, 8 ohms/tweeter.

Sum is: 4 deltalite ii 2515 and 4 faitalpro hf107 cd horns 1.2 kHz crossover

I know i should have built the otop12 instead, then i would have had tweeters for 4 lighter boxes. 🙂
Last edited by Camillo on Sun Dec 03, 2023 11:09 am, edited 1 time in total.
2x Titan48 26" - Lavoce waf.154.00 & Emin. 3015lf
2x OmniTop15 - Em.Deltalite 2515II- FaitalPro HF107
1x Titan48 "scrappy"- 12" MTX thunder8k car woofer
1x Omni15 TallBoy - 18sound 15g700 Mon. tf0615mr

Bruce Weldy
Posts: 8358
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Coupling on a budget, omnirop15

#2 Post by Bruce Weldy »

Since you have two horns per box, then I'd say yes - change 'em to parallel to get a 4 ohm load and adding another box with just the 15 should work nicely....just like having 2 boxes with one horn each. Just means that you'll need to run all 4 all the time to keep 'em balanced out. Unless you adjust the high end output everytime you go with just one a side.

And yeah.....you shoulda' built the OT12s. :mrgreen:

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."

Camillo
Posts: 64
Joined: Wed Apr 27, 2022 1:02 pm
Location: Sweden

Re: Coupling on a budget, omnirop15

#3 Post by Camillo »

Thanks Bruce!
Bruce Weldy wrote: Sun Dec 03, 2023 11:09 am
And yeah.....you shoulda' built the OT12s. :mrgreen:
True, and the reason was to get more low end when moving them for small temporary gigs, not using the titans. And for those gigs i'll have to use all four then if i change to parallell in the hf-section, didnt think of that...
But i think i remember you, or some one else said to use a mono-stack then, that should work if i dont want to carry cabs and reconnect, right?

Anyway, size is of no problem right now and The deltalites made them light enough:) i think the dr:s are a project before de Otop12s right now :)
2x Titan48 26" - Lavoce waf.154.00 & Emin. 3015lf
2x OmniTop15 - Em.Deltalite 2515II- FaitalPro HF107
1x Titan48 "scrappy"- 12" MTX thunder8k car woofer
1x Omni15 TallBoy - 18sound 15g700 Mon. tf0615mr

Bruce Weldy
Posts: 8358
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Coupling on a budget, omnirop15

#4 Post by Bruce Weldy »

Camillo wrote: Sun Dec 03, 2023 11:18 am
But i think i remember you, or some one else said to use a mono-stack then, that should work if i dont want to carry cabs and reconnect, right?
Yep, that was me......I've used a monostack and it works fine if you position it in the right place. And you are correct, no need to change the wiring config or reduce the gain on the top section.

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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Seth
Posts: 2816
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: Coupling on a budget, omnirop15

#5 Post by Seth »

Camillo wrote: Sun Dec 03, 2023 11:18 am ...I think the DR's are a project before de Otop12s right now :)
:fruit:
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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