TragicMagic

http://mobile.jlaudio.com/products_subs_enclusure.php?series_id=27
That's a link to the recommended sealed enclosure for the JL Audio 8W3v3.

Because of the specs on this particular subwoofer, I was going to get a pair of 8 ohm, single voice coil speakers, and wire them in parallel to put a 4ohm load on the amp, thus providing 210Watts to each speaker. But how do I wire these speakers when they're in their own separate enclosure??? Would it be possible to do it externally on the outside of the box?

This is a basic diagram I drew up showing the concept of what I want the box to look like.



Currently, I have that massive band-pass box taking up nearly half of the rear seat. I want the two 8" subs to fit in a 10" wide box that'll be situated in the middle of the rear seat, leaving more room for the odd passenger I get.

I have absolutely zero experience building enclosures, so I was hoping someone with experience could point out any flaws in my design. I'm worried that with the 45 degree cuts the structural integrity might be hindered if I don't reinforce it where needed.

Just out of curiosity, how much would a seasoned veteran charge me to fabricate this enclosure?

Dukk

Your volume calculations appear to be based on external dimensions - don't forget that the wood has thickness and will decrease your volume. If those are indeed external dimensions and you use 3/4" wood, you are closer to 400cuin of volume per chamber.

Any shop should have no problem building that for $150.

TragicMagic

Hey, thanks Dukk. I'll likely still keep the 10" width, but extend the 16" (approx.) sides to compensate for the thickness of the building material.

Would you, or anyone else, have a rough estimate as to what building this myself would cost me using good quality materials? If its any where under $100, I'll do it myself.

turboeeyore

a sheet of mdf is $30 and i see you live in brantford, if you take you're measurements with you to lowes they'll cut it for you too. the first two cuts are free and the rest are 25 cents each. it cost me $1.50 to have my box cut. after glue,screws, and jig saw blades ( to cut the sub holes) it was around $50. just make sure you're CUT measurements are perfect. if you don't want to do it yourself i know someone that will build it in brantford. for around $100.

TragicMagic

I might have an issue with this design. Look again at my drawing. In the side cut-out view I have not drawn in the body of the subs. I have to determine if corner of the magnets are going to hit the inside of the bottom and back walls...



Do you see where I'm referring to? I need to buy a couple of these subs first, and go from there. I could move them closer to each other in the middle, to avoid this issue. But I want them to be equidistant from the corners and each other...

turboeeyore

take a piece of mdf and cut out rings about 2 inches wide, the inside hole will be the size of the mount for the sub, the outside cut will just pass the outside of the sub.( or you can double stack the front face of the box with wood) it's like making a spacer between the sub and the box. if one isn't enough use 2 or 3. the more you use may start adding cubes though. my friend bought 2 10'' solobaric's 12 years ago and they wouldn't fit in truck boxes cause the magnets were to deep, so we had to improvise. worked great.

TragicMagic

I see. So the spacer would bring the magnet away from the back of the box .75", or whatever thickness of MDF I use. That'll work. Thanks.

joef

iTrader: (1)

You won't have enough clearance to mount 2 - 8's. With 1" spacing between subs you would have to bring them out approx 1 1/4" to squeeze them in and have the magnets clear. The 6" versions just fit in. All this is based on a quick sketch done in a CAD base program.
FYI, based on your sizes you have an internal vol of .1924 cubic feet for each chamber.

turboeeyore

i'd put them as close together in the centre as possible, so there almost touching. leaving enough room centre devider on both sides.

turboeeyore

http://http://www.the12volt.com/cara...xcalcs.asp#rec

check out the wedge calculator.

.3 cube looks right to me.