| Author | Message | ||
     Pokinatcha |
Someone around here has got to be working at a car audio place. I'm building a fiberglass enclosure for two 12" earthquake Magma's. Anyone know if dual chamber is of benefit as apposed to open chamber design? Got my bottom and rear caps framed up and my rings made. Gunna set them and start the fleece and glass process but having a hard time figuring out how to divide it into two chambers. So I guess my main concern is can you have two subs firing in the same chamber without them working against each other? It would way simplify the whole enclosure. | ||
| Piotr12 |
Ported or sealed enclosure? | ||
| Gentleman_jon |
Just wondering: why not install one facing forward, one facing into a sealed box, wired in phase. constant enclosure volume, drivers working together. Anyone seen something like that before? | ||
| Natexlh1000 |
I wouldn't use fiberglass though. I would use some good quality plywood. You're probably using fiberglass due to an awkward shape due to it being a vehicle, right? | ||
| Hootowl |
"Anyone seen something like that before?" It is called an isobaric enclosure. They are used when a large box is called for but there isn't enough room for one. The outside speaker feels an almost infinite volume behind it because of the inside speaker playing in phase with it. You lose efficiency though. | ||
| Xblaw |
Plywood is a horrible suggestion. I hope you a referring to MDF (medium density fiberboard). Glass makes perfectly suitable boxes, I don't think that is the issue. Sorry I do not know much about putting two subs in the same box, I have always had to do separate boxes. | ||
| Rockstarblast1 |
Ok iv been reading and I figured I'd chime in. Lol fiberglass is fine! But you will want to frame the bottom and sides with mdf if u can. I assume you know how many layers and stuff you need 2 use so I don't need 2 get into that as for dual or single chambers. I would try 2 make 2 seperate ones. The main reason is if something happens to go wrong with 1 sub it won't effect the other one and you will be able to tell what one is having the issue better. I would go into detail more but I'm on my blackberry and its a pita to type. Lol if you need any more help let me kno I have built many boxes. And have a lot of expirence with fiberglass. Jw what kinda car are you putting these in? How many watts are you pushin RMS? Obviously its going to be a sealed box if your going fiberglass. So the box doesn't need to be huge. Make sure you make it to the proper size/specs to the sub or it will sound llike poop. And you could damage the speakers if its too big or small. Chris | ||
| Natexlh1000 |
I used to work for EAW. Plywood is the best material if you use the high density 7/8". | ||
| Rockstarblast1 |
Eaw? I don't want to cause problems but your sayin somethin iv never. Heard or saw. MDF is what should be used. The stuff that looks like compressed cardboard almost. 3/4 inch for best results with powerful subs. | ||
| Piotr12 |
Actually Trupan is a better choice than MDF. There are several reasons why it is better: First is its weight. Trupan Light is only 80% of the overall weight of regular MDF. This will yield a much lighter enclosure overall. Even though Trupan is lighter, it still remains as “acoustically dead” as regular MDF. Trupan is also a much better choice of material to use from the builders standpoint. It cuts much smoother, routes easier, and holds screws much better than MDF. Not only that, but Trupan is much easier on the shop equipment. | ||
| Natexlh1000 |
Here: http://eaw.com/products/speakers/index.html They make little club speakers up to big freakish arrays that can sustain thousands of watts. Most of them are made of 7/8" plywood that has more layers than normal plywood. | ||
| 86129squids |
I love subs. One day I'd like to explore the possibilities of those bass "tubes" on a bike. Kewl thread. For good info, Google it or Wikipedia it. I've seen a few decent books written on the subject. +1 not being sure about the glass. Too many variables missing in the proposition. I'd get good wood. | ||
| Rockstarblast1 |
lol this thread would really be hell if he was asking about making a proper ported box! | ||
| Reepicheep |
Forget the ported box, make it a corner loaded horn!  (of course it would have to be in a tractor trailer for a sub-woofer.... ) | ||
| Edgydrifter |
I've seen both good and bad examples of wood and synthetic. I think both can work very well if done right. Both my home systems use wood (Onkyo) or wood-based (Klipsh) enclosures, and both sound great to my ears. OK... the Klipsh is actually way better, but if I didn't have it the Onkyo would be just fine with me. |
