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You do realize how much weight that will add, right?
The only problem is that bass can go around edges with ease. It will fill every gap in the car. The mdf on the other hand will add mass and a nice rigid surface. The mdf's nice mass will pretty much absorb quite a bit of bass away from the trunk walls and lid. It will also reflect very well.
But on the other hand, a few layers of sound deadener will weigh less, absorb as much bass energy and reflect not nearly as much.
You're always welcome to try it. To mount it, you won't want to put mdf against bare metal. Might cause some noisy vibrations. Best way to mount it is to bolt it somehow.
Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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If you are serious about doing this, pull all your carpet out and throw it in the corner of the garage.
Now take some 1/2" mdf and start cutting. Half inch will be plenty strong enough for a non-box application. You could even use plywood (not particle board) if you want to save some weight. Make a floor, sidewalls, and a rear wall for your trunk.
The best way to attach it would be to use lag bolts through pre-drilled holes with lots of adhesive. Subfloor adhesive is cheaper than Liquid Nails, and in my opinion works much better. It is designed to hold houses together for 50 years plus, through summers and winters, so it works great in a harsh automotive enviroment.
If you are unwilling to bolt it up, you can just use the subfloor adhesive. You still won't get it off without leaving some sort of a trace though...
[ 02-22-2002: Message edited by: adam728 ]
-------------------- 2001 Jeep 4.0L, 2" lift, Old Man Emu shocks 33x10.50 BFG AT's, Aussie Locker Some stereo junk More mods added with every paycheck
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Sealing off the trunk is the easiest and best way. If it is not feasable try sutting 3/4" MDF into 1" wide strips. Then use construction adhesive to glue these to the sidepanels and floor of the trunk. After thatt is all done run a coule layers of fibreglass over the MDF. That would be strong.
-------------------- Blow your mind - PORT your box!
D R A G U L A Let us Prey.... 1966 Cadillac Superior Crown Royale Hearse SS5+ Posts: 3690 | From: Abbotsford, BC, Canada | Registered: Mar 2000
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My trunk is sealed and I love it compared to a sub(s) firing into a trunk. Its cleaner and has a much better transient response!
Posts: 1259 | From: Fullerton. CA ,USA | Registered: Oct 1999
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when you seal off the trunk do you just put up like a 1' board of mdf and seal the subs from the back of the trunk?also does it get louder?does the bass bounce off the wood then into the cab?
quote:Originally posted by Mr.Dank: My trunk is sealed and I love it compared to a sub(s) firing into a trunk. Its cleaner and has a much better transient response!
I 100% agree. I used to have my 9515 in my trunk facing up, but when I switched for firing forward sealed off there was a huge difference in sound quality. Transient response is incredible now compared to before. Output wise, I really can't say if there was a difference, because I was running less power in the trunk firing up. Facing forward sealed off is the way to go. There is a lot less flexing and rattling in the trunk to deal with as well.
Posts: 3958 | From: State College, PA | Registered: Sep 2000
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quote:Originally posted by ilLUMINAte: But if I seal the trunk off will I still be able to sell the car when it comes time?
And would sealing off the trunk entail me having a 2-seater car instead of four? I want to keep 4 seats.
Thanks.
Not necessarily. If you seal it off behind the rear seat you'll be able to retain them, as I have done in my car. If you have a fold down rear seat, you're in a perfect situation for sealing it off from the trunk. If your rear seat isn't a fold down style, you can still seal it off, but you may have to cut some metal supporting the rear seat in order to get the best performance.
Posts: 3958 | From: State College, PA | Registered: Sep 2000
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What would be the easiest and most effective way to seal off the trunk? I have fold down rear seats and would like to fire the subs into the cabin but I'm afraid of losing SQ and/or SPL. If the trunk is properly sealed, will this eliminate any losses? Also does anyone have any pics of a sealed off trunk?
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Make a box that fills the opening as much as possible. Then put it in there and fill around the outside as much as possible, sealing off every gap you can. You may have to build the enclosure in the trunk, as I have done.
Posts: 3958 | From: State College, PA | Registered: Sep 2000
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quote:Originally posted by Rybaudio: Make a box that fills the opening as much as possible. Then put it in there and fill around the outside as much as possible, sealing off every gap you can. You may have to build the enclosure in the trunk, as I have done.
What are you filling it with? Can I just use pieces of mdf and carpet it to match the box? Do you have any pics of your intall by the way? thanks for the tips.
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