Line array has been started.

[IamDeMan 5,000+ posts]

I bought my NSBs a little before Brandon did. I am just now getting started building my towers. They will be 8 ft tall and tuned to 60hz. They will contain in each tower 16 NSBs paired with 12 dayton 3/4" tweeters and a 12db basic XO @ 4.5Khz. I plan on doing 3 layers of laquer. I am contemplating wheter buring a 1/4" hole in dust cap should be done. I have seen it recomended a few places to aid cooling. Anywho here is 2 days progress.

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[baseballer1100 5,000+ posts]

Those are going to be sexy what are you going to use to cut all those circles out?

 

[IamDeMan 5,000+ posts]

Those are going to be sexy what are you going to use to cut all those circles out?

Plunge router and my Jasper jig. I wish the jig worked with my dremel though. It would be a lot less cumbersome for this size circle.

 

[jeepintn 10+ year member]

gonna look very nice. keep us updated.

 

[joetama 5,000+ posts]

Booo evil Line Arrays..... Anyway, looks like you got a nice start keep it up, just don't get too crazy on us now....

 

[baseballer1100 5,000+ posts]

Plunge router and my Jasper jig. I wish the jig worked with my dremel though. It would be a lot less cumbersome for this size circle.

jasper jigs and plunge routers pretty easy to use though? I just bought a jasper jig today and already have a plunge router.

 

[IamDeMan 5,000+ posts]

Booo evil Line Arrays..... Anyway, looks like you got a nice start keep it up, just don't get too crazy on us now....

teh line arrays shall prevail, muhahahahahahahaha

Thanks mang.

jasper jigs and plunge routers pretty easy to use though? I just bought a jasper jig today and already have a plunge router.

Totally easy, and pure lifesaver for large diameter circles. On smaller ones it feels cumbersome but gets it done.

 

[dalucifer 10+ year member]

i

 

[baseballer1100 5,000+ posts]

teh line arrays shall prevail, muhahahahahahahaha
Thanks mang.

Totally easy, and pure lifesaver for large diameter circles. On smaller ones it feels cumbersome but gets it done.

Sweet can't wait to get mine in..

 

[thylantyr 10+ year member]

1. Don't mess with NSB dust caps.

2. Try to make the ports swappabled to allow different tuning.

[60hz - 100hz range].

3. Best NSB SQ = 4-6 coats of lacquer on the paper cone & dust cap, not surround.

4. NSB frame lip sucks, it hinders proper NSB installation in the hole for an air tight fit. Do some test cuts on scrap wood to analyze perfect fit. Use rope caulk as

the gasket material between NSB and wood.

5. Minimize internal chamber echo with good sound conditioning polyfil, but

don't hinder port operation - keep the poly near the walls and leave the air

space more open.

6. High pass the NSB to minimize cone excursion. Try 80hz - 100hz with

2nd order - 4th order crossover. I cross mine at 65hz, 8th order as it works fine.

This boosts your power handing - or run no high pass but keep volumes much lower.

Did you come to a conclusion on wiring?

 

[IamDeMan 5,000+ posts]

I'm going to do 4 groups of 4 wired in paralell then series wire the groups for a final 8 ohm load. For awhile they will only be getting 110 watts RMS or less. If I decide to juice up down the road, I'll reconfigure it.

 

[brandontw 10+ year member]

**** i was hoping you would never get around to building them so i wouldn't be bested.. but theyre already looking better than mine...//content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif

what sort of wood is that- mdf? Im glad your using more tweeters, and putting more planning into the enclosure design, those are the two things i regret... Dont get me wrong, im still extremely happy with mine, just things i would have rather had... i rushed into mine.

Also, be sure to get all your tools out before you seal them up, im pretty sure i have some needle noses sitting on the middle brace of my left speaker..//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

As thylatr said, be sure to do alot of test runs on the NSB mounting, they are very awkward to mount, i wish they had made them easier to mount //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Congrats on getting started, and keep this thread up, i want to see the process so i can learn more for my next project...

 

[IamDeMan 5,000+ posts]

**** i was hoping you would never get around to building them so i wouldn't be bested.. but theyre already looking better than mine...//content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif I wouldn't say that. Yours look **** good.
what sort of wood is that- mdf?Baltic Birch ply Im glad your using more tweeters, and putting more planning into the enclosure design, those are the two things i regret... Dont get me wrong, im still extremely happy with mine, just things i would have rather had... i rushed into mine. I know I will have to attenuate the tweeters some. I have Lpads that I have no clue on how to wire up yet lol.

Also, be sure to get all your tools out before you seal them up, im pretty sure i have some needle noses sitting on the middle brace of my left speaker..//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

As thylatr said, be sure to do alot of test runs on the NSB mounting, they are very awkward to mount, i wish they had made them easier to mount //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Congrats on getting started, and keep this thread up, i want to see the process so i can learn more for my next project...

Yes, I can see these buggers being a pain to mount. One thin *** lip.

 

[ngsm13 5,000+ posts]

Cool.

Subscribed.

nG

 

[brandontw 10+ year member]

Baltic Birch ply

Cool, it look like its going together better than my pine boards did...