Omnitop12, my first

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Tom Smit
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Re: Omnitop12, my first

#31 Post by Tom Smit »

Interesting. Did you use MIG?
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ACUA
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Re: Omnitop12, my first

#32 Post by ACUA »

It was a tig machine. I’m no tig aluminum expert but it will hold I recon!
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Re: Omnitop12, my first

#33 Post by ACUA »

Well I hope they don’t sound funny being aluminum!!!
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Re: Omnitop12, my first

#34 Post by ACUA »

Started building my second set of otop12s. So far so good. It is sure nice having a second set of hands for glueing
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Re: Omnitop12, my first

#35 Post by ACUA »

I’m building in 40-48degree weather lightly been raining/sleeting. First time working pl in the cold, well it’s cold for me. The pl is a lot more workable at these lower temps as it does not ooze out so much and it bubbles less while curing. I have a lot more time to work it before it starts to set as well. This compared to normally when I work it’s 100degree Arizona weather usually. The 8x stronger version of pl does not work so well in the cold, it’s too thick.
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Bill Fitzmaurice
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Re: Omnitop12, my first

#36 Post by Bill Fitzmaurice »

Be careful, if too cold it won't cure. I'd take the cabs to a heated space to cure the PL.

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Re: Omnitop12, my first

#37 Post by ACUA »

Thanks for the advice. I am getting it to cure it is slower but it is behaving better then when it 100degrees outside.

When you don’t have enough wood clamps some old rusty weights work I guess!!!
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Re: Omnitop12, my first

#38 Post by ACUA »

More weights.
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Re: Omnitop12, my first

#39 Post by ACUA »

Well one complete today. It’s funny how many little things it takes to build one of these speaker cabinets. The wiring always gets me. I like the wiring part but it is time consuming and I find it odd what it takes to keep the wiring tidy and I still can’t manage a solder joint with out and extra set of hands. One on the gun one on the solder one on the part and one on the wire about six times over.
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Re: Omnitop12, my first

#40 Post by ACUA »

Took me a few days but I have completed my fourth otop12. Yay I did it!!! My wife says it makes a good place to put her craft stuff and we’ll!!! I can’t argue :noob:
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Re: Omnitop12, my first

#41 Post by ACUA »

It’s been a while, I built some more speakers. I wanted to show off. The sound out of these cabs when coupled is awesome.

More of my special aluminum cd diffraction horns
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Re: Omnitop12, my first

#42 Post by ACUA »

I built a pair of dual loaded otops12, same simple stain job as always. I set the rig up in my house just for fun. :shock: i may have over done it. I am so happy about this rig.
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Seth
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Re: Omnitop12, my first

#43 Post by Seth »

Super Bad Ass ACUA! I wonder how thin you could go on the sheet and still have it be easy enough to work with, maintain acceptable rigidity, as well as remain sonically stable.

I probably wont be doing any of these... buttttt, I have been looking for a good excuse to purchase a TIG welder. Hmmm (strokes chin with thumb and forefinger)

:thumbsup:
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
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jimbo7
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Re: Omnitop12, my first

#44 Post by jimbo7 »

Question about the diffraction horns: Did you cut/weld/bend based on the outside dimensions of what the wood version measured?
I'm not sure it'll matter, but grampa yoda might chime in. They look bada$$ bare metal. \m/ (>.<) \m/
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XF212
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AT 18" JBL GTO804
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Re: Omnitop12, my first

#45 Post by ACUA »

Using 1/8in sheet aluminum I kept to the ID of the horn specs, the hole is 1in, the triangle piece at the ends are actual dimensions, I just don’t have to cut angles into any of it. If I tap the horns it rings a little which bothers me I think I will get some dynamat deadening material and adhere it to the outside and see what that does. So far so good though it seems the ring below the horn pass band so!!!
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