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-   -   FC : Sub enclosures ??? (https://www.rx7club.com/interior-exterior-audio-26/fc-sub-enclosures-794063/)

DrKillJoY 10-26-08 09:18 PM


Originally Posted by JustJeff (Post 8670683)
Oh yeah....here is where I originally wanted to put the 8. With my experience with the JL10 under the reardeck, I wasn't expecting much satisfaction from the 8 under the deck. BUT it was also much, much easier to build than the same speaker mounted in the cockpit of the car.

It's going to rattle the hell out of your wind deflector :lol: :D FWIW - That's pretty much where they put the subwoofer in the factory Viper system.

Here is a view of an upgraded system in stock locations:

http://www.viperalley.com/gallery/da...L_Speakers.JPG


Originally Posted by 90FC (Post 8670659)
No. Should it?

It can. Depending heavily on the quality of the plywood and the wood used to make those plys. Some plywood such as birch ply or A-A marine plywood can be very good for making boxes, while other types of plywood with lower ratings can contain imperfections and poor adhesive materials which can lead to poor performance. MDF is generally considered the best bang for the buck when building boxes because the material is generally consistant and easy to work with.

JustJeff 10-26-08 09:52 PM


Originally Posted by DrKillJoY (Post 8670767)
It's going to rattle the hell out of your wind deflector :lol: :D FWIW - That's pretty much where they put the subwoofer in the factory Viper system.

Yeah, I thought of the dirty "R" word. I've got the whole bottom side of the reardeck sound deadened (which makes it absurdly heavy) from having the JL10 under there. If I end up mounting the 8 like the pic showed I was probably going to remove the wind deflector. The diameter of the 8 was too wide and I was either going to have to angle the woofer and always have the deflector up, cut the deflector, or remove it all together. I was also inspired by driving my brother's Boxster S, they put a transparent permanent deflector between the seats. I was considering fabricating something similar

I'm surprised no previous RX vert owner has posted anything similar to the Viper pic? It seems "common sense" to want to put it/them there. But then again I got a better idea of the work involved and backed off.

It seems like the 8 under the deck is going to be just fine, but time will tell.

DrKillJoY 10-26-08 10:45 PM

Under the deck surely is the popular choice.

Ive considered taking my top out permanently and making a fiberglass cowl (ala Corvette) and building the subs into the lower part of the covered area as their own deck along with the amps. Basically they would have a little "cave" under there covered on top by the fiberglass.... but that's a big project I'm not quite ready for.

Example of Corvette Cowl I'm talking about

http://www.gasolinealleyantiques.com...et-silver1.JPG

90FC 10-26-08 11:15 PM


Originally Posted by JustJeff (Post 8670762)
I'm definitely function over form. Yeah the green stuff is fiberglass resin hardened. Read my post a little ways up, there is a quick write-up on how I made it.


Ooohhh. Sorry I had looked though it a yester day, I must have forgot.


Originally Posted by JustJeff (Post 8670762)
I've got a couple pics of the opposite side of the box I can post if you'd like.

Go for it. I was thinking of using fiberglass to make mine, but I hadn't worked with it before, so I thought it would be easier just to use wood.

90FC 10-26-08 11:27 PM


Originally Posted by DrKillJoY (Post 8670767)
It can. Depending heavily on the quality of the plywood and the wood used to make those plys. Some plywood such as birch ply or A-A marine plywood can be very good for making boxes, while other types of plywood with lower ratings can contain imperfections and poor adhesive materials which can lead to poor performance. MDF is generally considered the best bang for the buck when building boxes because the material is generally consistant and easy to work with.

Poor performance as in the wood seperating, causing rattles and leaks? I guess only time will tell. It sounds fine right now.

If it starts giving me trouble, I'll just rip it out and start over. I'm not really one to say good enough.;)

DrKillJoY 10-26-08 11:40 PM

Yeah that's part of it wood separation, but also there is typical a lack of uniformity in the wood. Some areas are dense, some not so much. These can cause other sound quality issues. It might not be an issue for a casual install, but just knowing it was there would give me nightmares. :D

jshiz 10-26-08 11:46 PM

DKJ basically summed it up for me. In my expirence, just say no to plywood.

90FC 10-27-08 12:27 AM


Originally Posted by DrKillJoY (Post 8671128)
Yeah that's part of it wood separation, but also there is typical a lack of uniformity in the wood. Some areas are dense, some not so much. These can cause other sound quality issues. It might not be an issue for a casual install, but just knowing it was there would give me nightmares. :D

I think I'll be fine. Like I said if starts giving me trouble I just start over. I made my choice with good reason, weight. This artical said plywood can weight half as much as mdf, and doesn't say that its not a good Material to use. Yes its from the 80s, but it was from a book and wood hasn't changed much since then, only the power from subs. I'm not running enough watts to worry about it.

And I don't like to think anything I've done to my car as "casual". :D

DrKillJoY 10-27-08 12:34 AM

I meant casual as in non-competitive, not as in the quality of work.

99% of installs aren't meant for competition, I figured "amateur" would have a less appropriate term.

90FC 10-27-08 12:42 AM


Originally Posted by DrKillJoY (Post 8671254)
I meant casual as in non-competitive, not as in the quality of work.

99% of installs aren't meant for competition, I figured "amateur" would have a less appropriate term.

Oh, sorry miss understood. I guess I'm naturally defensive. :)

No, I would not consider my box a competition setup.

JustJeff 10-27-08 01:44 PM

4 Attachment(s)
Here's the even uglier side of my enclosure. The woven material you see is fiberglass matting cut into strips. I included a pic of the well, add some deadening material to the well and it form fits, with very little unused space.

JustJeff 10-27-08 01:50 PM


Originally Posted by DrKillJoY (Post 8670972)
Under the deck surely is the popular choice.

Ive considered taking my top out permanently and making a fiberglass cowl (ala Corvette) and building the subs into the lower part of the covered area as their own deck along with the amps. Basically they would have a little "cave" under there covered on top by the fiberglass.... but that's a big project I'm not quite ready for.

Example of Corvette Cowl I'm talking about

http://www.gasolinealleyantiques.com...et-silver1.JPG

Oh to dream

10thaniv 10-29-08 09:53 AM

1 Attachment(s)
I've installed a couple of sub setups in my FC and I found that the box in the storage bins sound like S--t. I was using 8" Kicker competition speakers with an Alpine v12 amp. It looked the best, but did not perform good. I ended up buying a 8" 4ohm dual voice coil Bazooka tube and mounted it to my rear strut tower bar. Looks good and sound great. My amp is located in the storage bin now. My garage has a picture of the bazooka tube installed.

yeti 10-29-08 06:26 PM

ah nevermind I misread. anyway I have a 12 in my vert. pictures to come.

90FC 10-30-08 01:47 AM


Originally Posted by 10thaniv (Post 8677757)
I've installed a couple of sub setups in my FC and I found that the box in the storage bins sound like S--t. I was using 8" Kicker competition speakers with an Alpine v12 amp. It looked the best, but did not perform good. I ended up buying a 8" 4ohm dual voice coil Bazooka tube and mounted it to my rear strut tower bar. Looks good and sound great. My amp is located in the storage bin now. My garage has a picture of the bazooka tube installed.

It sounded like shit because you probably didn't do what I did to relieve pressure. Theres no reason you(anybody) can't make them sound good in the bins, I did.

http://farm4.static.flickr.com/3046/...ea884db5_b.jpg

DrKillJoY 10-30-08 02:05 AM


Originally Posted by yeti (Post 8679184)
ah nevermind I misread. anyway I have a 12 in my vert. pictures to come.

LOL. I saw what you wrote. :lol:

Why does there seem to be a direct correlation to reading comprehension and being a prick on the internet. :dunno:

(I only make this statement after seeing numerous people today make rude lil snips, only to apologize about it or edited it moments later citing they misread)

yeti 11-04-08 01:47 PM

4 Attachment(s)
Oh it would have been the same reaction in person too.. I don't remember exactly what I said but I was about the packaging peanuts I thought they were leaving it in the box as you would with polyfil. Instead of using it as a unit of measure. haha But yeah I have some ployfil in mine but I'm not sure of the effects. Anyway, here are some pictures I have...

The purple paint is what I had around, it's chipping because there was some weird primer stuff used that didn't work. And this was my first and cold ass winter outside box. So it's not the best. Although I think it's alright I could certainly do much better now that I have some experience.

10thaniv 11-09-08 12:09 PM

2 Attachment(s)
I found an old pic of my sub in storage bin. I did not want to cut the lid up, triing to keep all parts on my 10th original. Now the bin looks like this.

ls2toy 11-22-08 01:06 AM

so i finally got around to building a box for my 10. what i did was take out the passenger side storage bin completely and build the box within the parameters of the stock bins, its a pretty small box but i'm not going for huge slumpin bass, it should sound pretty tight because the airspace is limited, but i utilized what was available to me :) . it's drying as we speak, as soon as i get it screwed in and carpeted i'll post pics, just giving an update.

ls2toy 12-20-08 09:25 PM

hmm, tried out the box that i made and not too satisfied with it, the bass it gives is ok, tight and punchy but just not enough for me, i made it as level as i could without having to make it slanted to conform to the bottom of the bin, so it was only about 6-7" deep. i'm going to redo the bottom half of it and make a custom fiberglass enclosure so it'll give more air space. should be done with it pretty quick so i'll let everyone know as soon as i finish :)

islanders_rx7 12-28-08 01:14 PM

3 Attachment(s)
Finally got the pics up

RotaryPicha 01-09-09 09:25 PM

I like that setup Islanders

FC3S Murray 01-09-09 10:52 PM

1 Attachment(s)
10 inch oldschool Rockford Fosgate Punch.

What I did was instead of making a box, I used the composite material that is already below the bins and injected Great Stuff Foam to make the bin area enclosed. Then right behind the passenger seat, near the bottom side of the bin, I drilled out a 3 inch hole and inserted a bass port and sealed it up as well.

Sounds great and have ran it like this for 4 years.

RotaryPicha 02-16-09 04:43 PM

How does those speakers sound in fiberglass enclosures? Don't believe i've heard any like that yet just mdf.


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