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Re: Optimized enclosure for JBL D-130 ?

I have a few quest considering the building of your enclousure.

First I plan to build it with 19mm partickelboard with 19mm MDF in
sides ,top and bottom ? thats because I am on a budget.

> I would use well-braced plwood

I could use finnish plywood in baffle if you think it make any change musically? It maybe "sings" better?

> Better, it will "sing: less!

I plan to make baffle 2*19mm thick? IF I use partickelboard.

> good

I would mount the driver from the back of baffle.
So then I could use all type of drivers for experiment.

> fine

I like to make the back removable. If I make this 5 inch Brace in wood 1"inch and like a "T" I could fit the back with screw´s to it?
Or is it better to glue it to the back and fit it to the top and bottom with screw´s ? this would make it easyer to change drivers.

> make 1"x4" brace ( 1" siude to back) and try not to have more tha 18" antwhere not braced. A front to back tie in is a big help.

I have been thinking of making port-lenght changable? between 30-40cm? Is the portlength akting as a pipe? If so could changing the lenght change the dip at 250Hz?

> it is the port Area that is causing the dip

My room is 3,8 meter * 5,7 meter and 2,5 meter to the roof.
Is this room any different in peak/dip to the room you measured in?

> a bit, I was just trying to show that the outdoor measured dip, may not be so audible in a room. Hit is Hit

I know i have a 90Hz peak in here I plan to build a basstrap.

> good..I have never tested them- but they work.

I also wonder if 130L is the final volume for my driver? is this without the ports?
> Yes
should I build according to the plan on your Website?

> Or here in the "Gallery"

would I loose much if I make it 120L or 140L ?
> it is a "best fit" now

I have the 15" RCF and Fane drivers .and 12" Altec414-8E.
I could come up with some 15" Coral drivers from a friend and maybe som JBL D,K,E-130.

> ..well that is an entire new design

I think I would test Altec 414-8E I know it´s a 12" but I could close down a part of the port´s if necessary?

> " "

Or ...maybe you have any suggestion about another design for that? it sounds very good in the middle.
> no I really like the D130 type speaker.

Best, bill

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