Another Line Array Project

[Turboegt]

Hello Everyone,

I have been a member here for a while but rarely post. Instead I have spend countless hours reading and trying my best to soak up as much info as I can. After all my reading Line Arrays really caught my eye.

My goal here was to build something cheap, loud and if it sounded good that would be a bonus too. I wanted something to take over duties from the Definitive Technology mains when I have people over for get together or other high volume situations.

The enclosures are 81.5" high, 12" wide and 14.5" deep. They are made out of 3/4" MDF. The enclosure was divided into two main sections: Mid section and tweeter section. This way it will be easier to seal the mids. The mid section was then divided into four subsections with 4 drivers in each. These drivers will be wired in series together (the drivers I will be using are 4 ohm). I also made braces so overall there is bracing between every other driver to keep resonance to a min. Each set of four drives will then be wired in parallel for an end impedance of 5.33 ohms. I also tried to keep the drivers as close together as I could to keep comb effect to a min.

The mid drivers I will be using are old MTX Blue Thunder 6.5" mid/midbass drivers I got REALLY cheap. They should work pretty good for my needs.

As for the tweeter section I will be using the small tweeters Apex have for $.50. I am going to using as many as I can depending on impedance and such......still working on that part.

Anyway, let me know what you think and try not to flog too badly

[Turboegt]

another pic of the inside bracing and dividers

[Turboegt]

Here one of my standing next to one of the towers. I am 6" tall to give you some scale.

[Bill Fitzpatrick]

Good construction technique but why are you standing in the dark?

[Turboegt]

Well I really am not in the dark totally, LOL. I am a car audio/video installer by day and that picture was taken in part of the bay with some poor lighting but for some reason the flash did not go off.

I will post more pictures as things progress with these.

[Coulomb]

You know between you and the speakers, there is a joke in there about piling er.. stuff that high!

Actually the cabinets look good, it is a shame you are going with cheap drivers. I would love a pair of cabinets like that to stuff with some Vifa, Morel, Scan/Speak speakers.

Oh well, I will be interested to hear your listening impressions.

Regards

Anthony

[chipco3434]

Fitz is quite the photo critic tonight...

You'll love them when they're done. Have you ever listened to LA's before?

[Turboegt]

I really have never listened to any on this scale. I am really looking forward to it though.

Any other commments are welcome.

[thomas997]

Ive read the Apex Jr. tweeters should be great for this application.

Do you use the MDF much in cars?

btw nice work area

[Turboegt]

Ya, the store I work at is one of the best. We have built demo cars for companies like JL Audio. Kicker, Stinger, Jensen and many others.

We use MDF in car audio everyday along with fiberglass and two part foam. With those three things we can make just about anything, any shape you need or want.

I will be ordering the tweeters sometimes this week. Should be really fun prepping the tower for all those tweeters but I think it will all be worth it.

Anyone have any thoughts on sub arrays??? Was thinking about building matching towers with 4 or 5 Dayton SD315-8-8 12" subs per tower ported. On my box program it looks pretty good in about a 2.5cf enclosure. I am not really sure what room gain would do to it thought. I am used to in-car gains, not in-room gains. Any help here would be great. Again the goal here would be good SQ, high SLP, cheap and a little on the overkill side.

Thanks for everyones positive feedback on these so far.