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Old 08-23-2012, 02:30 AM   #1
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Rear Hatch Area: Making False Floor/Storage Areas/Sub Enclosure

Finally got around to tearing out most everything in the rear of my hatch. Seats are gone, spare and tools are gone, along with the foam spacers and carpet. I'm looking to put a solid floor in place that extends all the way up to the front seats, and sits at or below the same depth as the stock carpet panel. The general idea is to install a two piece floor (cut from left to right, right at the rear of the rear doors), with a sub and one or two amps in the front, and storage in the rear. The rear storage will have one or more "doors" so the whole panel doesn't need to be lifted to access it. I'm thinking the best use of space will be to extend the floor almost right up to the front seats (over the foot well), then put one maybe two subs there facing forward towards the front seats. That should give them plenty of internal volume (will likely seal it all up), and no worries about hurting them by putting stuff on top.

I'm not going crazy with storage space, I want a reasonably sized 12" sub and 1-2 amps (for speakers and sub), and enough storage space for a shotgun/rifle, and basic automotive tools. Ideally I'd like to be able to have a small jack (maybe bottle jack?), lug wrench or ratchet/socket for wheel lugs, and a basic driver/ratchet kit for general emergency work. If the spare fits somewhere great...if not I don't really need it. Have 24/7 towing so no need to get myself killed trying to fix a blowout on the freeway or something. The jack will help if for whatever reason I can't get a tow truck...the jack isn't even really required, either.

So, looking for input on how to get this done. My primary concern right now is what to use for supports. Wood will be heavy, and I'd like to keep weight down. I'm also not 100% sure on using a fiberglass floor. Might be too much time/effort to make that up myself (still researching that).

Will post some pics tomorrow when it's daylight.


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Old 08-23-2012, 11:53 AM   #2
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Old 08-23-2012, 12:47 PM   #3
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OK, can't decide where to mount the sub. First issue is that there is less room in the rear foot well then originally anticipated. Some measurements showed that putting a sub there will be difficult (although not impossible). Another issue is that from what I've read, having the sub fire forwards leads to poor quality. What I'm wondering is this:

- Will mounting the subs in the same position (foot well area) but firing rearward (right into the floor board/right under where you would typically sit) sound better?
- How does mounting the sub straight up compar to rearward?

I don't need the best quality possible, but I want it to sound good. I'm also concerned with the enclosure...if I build it myself it WILL be sealed. I have zero desire to tune a ported box. So going with a ported enclosure will sound better in any given position, it'll be a premade box.
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Old 08-23-2012, 09:13 PM   #4
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New gameplan:

Will likely have this sectioned off into four separate panels on top. In the hatch area, there will be three panels, two right on either side that will come inside just enough to get to the spare wheel well, and a third panel that will cover the spare area. The third panel will be hinged where the hatch area meets the rear seat area, to be used for storage. The other two panels will likely be static.

The area directly over the rear seats will hinge as well, right where the rear panel is but opening the other way. It will likely be a single unit, capable of holding a rifle or two, and other similar items. It will not come right up to the rear seats as initially planned...I think instead I'll buy (or make, maybe...) a sub enclosure to fit right behind the rear seat, and have it be standalone. That seems MUCH easier then fitting it elsewhere, and the enclosure itself will likely be significantly better doing it this way. The 1-2 amps will be mounted in the opposite foot well area.

For supports I think I can get my hands on some aluminum angle (1/8" thick) to make a structure for the wood floor to sit. It should be plenty strong enough to be used sparingly, so weight won't be an issue.
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Old 08-23-2012, 11:29 PM   #5
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Damn man, that's a lot of ideas being tossed around, you will have to post some pics of the design and the finished product for us to see
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Old 08-28-2012, 08:24 PM   #6
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Quote:
Originally Posted by Joeywhat View Post
Another issue is that from what I've read, having the sub fire forwards leads to poor quality. What I'm wondering is this:

So going with a ported enclosure will sound better in any given position, it'll be a premade box.
A sub in a car is basically you, sitting in an enclosure, with an enclosure. There may be a response difference depending on which direction you point the cone, but there will not be a quality difference.

Any response difference you see could be completely undone by moving your head just a few inches side to side, or a change in frequency of just a few hertz.

The ported/sealed question depends on the speaker. A ported box will almost always be louder, but honestly, the chances of buying a premade ported box that works great with whatever speaker you go with is very low. If you're going to go through the trouble of tearing up your car to do all this work, you should go through the trouble of making the box, too.

I can show you how to design the box based on the speaker if you need help with that.
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