astravan sub enclosure

Hello Everyone,       I've Been a long time lurker and only recently needed more help than can be provided using the search feature. Thanks to most tutorials on here as well, they've been mega useful! Right my 'problem' is this; I am attempting to install a 12" pioneer sub in my 54 plate astravan. But i decided to be awkward and choose to install it in the cab. Didnt really want all the sound to be in the back. For those who dont already know, there are 8" high holes in the bulkhead just behind the seats, Pefect really. I've cut the holes out a bit and made a 'half' fiberglass inclosure to fit over the hole and hold the sub in place. Its not finished yet but its getting there! I have only recently thought about what is behind these holes, big voids, going all the way back to the rear wheel arch. Not going to be a perfect sealed enclosure really.. I have had a few ideas, first being expanding foam, and creating a wall, but its way too big, and wouldnt really be air tight, obviously trying to go over this with FG would destroy it too being oil based. The other idea was to fit some mdf in there as tight as i can, and again FG over it, but this is going to be really awkward due to accessing it through the hole, and with the seat in the way. (how easy is it to get the seat right out of the way?) Plus surely i will need to get the enclosure as close to the reccomended size for a sealed enclosure. Anyone Had any experience with anything like this? Any ideas? Is it worth my continuing or shall i just dump it lazily in the back? Thanks in advance for replys/ideas. Ben

nobody?

Hello, This forum sucks. I've looked for advice and found there are very few people on her that actually know enough to help out. If i were you I'd find a new forum or search the internet for ideas. If your good with wood id go mdf and fiberglass over it. The foam would be a mess and will waist space that could be used for more box volume. Remove the seat though it will make working inside the cab 100 X's easier and is well worth it. Sorry for the little amount of response to your forum post. -Devin-

irocsound wrote: Hello, This forum sucks. I've looked for advice and found there are very few people on her that actually know enough to help out. If i were you I'd find a new forum or search the internet for ideas. If your good with wood id go mdf and fiberglass over it. The foam would be a mess and will waist space that could be used for more box volume. Remove the seat though it will make working inside the cab 100 X's easier and is well worth it. Sorry for the little amount of response to your forum post. -Devin-

I'm sorry you feel that way about this forum. I've used it religiously and have always found people to be extremely helpful. I will agree it's not the biggest forum for glass work, but anything else this place has it covered.

On to the problem. I'm not 100% familiar with astro vans, but what if you took some 12" pvc and used that as the enclosure? it would fit the hole and you could easily figure up the volume. Just seal up one end and put the sub in the other, then slide it into the hole you've cut out. Just a thought.....

...don't crush the weasel...

Woah thanks for the reply, had pretty much given up here! i am thinking the same about the seat, looking into that now, cheers irocsound! Tubbs you mentioned about 12" pvc, and i'm not intirely sure what you mean. Pvc sheets? The thing i am working on at the moment is the internal bit, inside the hole. Sealing the inside is alot harder than sealing the outside.. How are you suggesting i figure up the volume? Thanks in advance. Ben

the sub is asking for about 1.35cu. ft. I think thats the reccomended size. Thing is.. I dont think 12" pipe will anywhere near fit in the gap. I'll have a look but even whenits past the hole i think the wierd shapes inside the gap mean that nothing like that could. I'll put some more pics up when i get back from work, Might be able to help better then.. Thanks though, Ben

Mate i'm almost there, in the final stages now. Dynamatt in, Cables in, Amp in, Just gotta put that sub in and i'm all set. I wil post pics of the final product soon. Thanks for all advice. And if anyone wants any help doing a similar project i have quite a few helpful hints that i learnt on the way. Ben