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View Full Version : Need help sealing off trunk.



Juice0723
06-02-2009, 02:07 PM
I was wondering if I had to seal the rear deck off as well. Because there are holes for the trunk to open like hinges are there. And there are holes for the seat belts. This is all on the rear deck.

So how do I properly do this? I already have the spaces around the box sealed off.

dappa5
06-02-2009, 02:10 PM
use dyna mat or a like product

peas247
06-02-2009, 02:25 PM
sound deadner, great stuff expanding foam, and duct tape

Juice0723
06-02-2009, 02:37 PM
alright thanks for the info so far. I don't have access to sound deadener in my town. So I guess I'll use duct tape. I used expanding foam around the box.

I don't want to use it on the rear deck though because it may mess up the seat belts or the trunk opening.

dappa5
06-02-2009, 02:51 PM
back tape area off then foam it carefully then cut away excess foam (carefully)

Juice0723
06-02-2009, 06:27 PM
I just duct taped every hole I could find in the rear deck. Does the tape actually stop the bass from getting into the trunk? I'm hoping this is worth it.

dappa5
06-02-2009, 06:46 PM
it helps to slow tha air flow

SPL KID
06-02-2009, 06:52 PM
i would leave the rear deck open would keep pressure higher and duck tape won't work properly depending on the amount of pressure your generating.

shakinghorizons
06-02-2009, 07:39 PM
alright thanks for the info so far. I don't have access to sound deadener in my town. So I guess I'll use duct tape. I used expanding foam around the box.

I don't want to use it on the rear deck though because it may mess up the seat belts or the trunk opening.

Very true, nothing in my trunk latches anymore its all messed up with great stuff. I will never do it again, Sealing the box off yes, make sure you tape everything off first so it don't directly bond to anything like carpet or plastic, its really messy when applied, and a super pain to get off your fingers. Be careful

shakinghorizons
06-02-2009, 07:40 PM
A few rolls of duct tape was seriously my best investment in car audio, duct taped it and fiberglassed over it. at least a 2db gain after sealing it off just with tape.

DEdwards
06-02-2009, 07:44 PM
Just wondering.......why are you sealing off your trunk?

chase007
06-02-2009, 07:47 PM
Just wondering.......why are you sealing off your trunk?

To keep Sound Inside?

DEdwards
06-02-2009, 07:49 PM
To keep Sound Inside?


No I am wondering if he is using an IB configuration...

chase007
06-02-2009, 07:50 PM
No I am wondering if he is using an IB configuration...

I doubt it he is prob just trying to gain a db or two, and keep some sound inside.

shakinghorizons
06-02-2009, 07:50 PM
Think about it, a trunk rattle/flexing is lost energy in the form of sound that could rather be used in the cab.

chase007
06-02-2009, 07:52 PM
Think about it, a trunk rattle/flexing is lost energy in the form of sound that could rather be used in the cab.

2x....Op you should invest in Acoustic dampning. Someing good like damp Pro or dynamat. . . That would be better then just filling in some holes. . .

DEdwards
06-02-2009, 07:54 PM
oh...this is a SPL thread...never mind... lol

Juice0723
06-02-2009, 08:35 PM
I want to get rid of those rattles from the back and also want to be louder. I could get some deadener online but the whole reason I'm doing this is because there is a sound comp on june 13. And I won't have the deadener in time. I sealed it off pretty good around the box with expanding foam (great stuff brand).

I also am using a ported box.

basshedz06
06-02-2009, 10:54 PM
well i would hope your using a ported box to go through all this trouble of doing it lol. hope you get what you trying to acheve bro.

Juice0723
06-03-2009, 02:43 AM
Alright I hooked everything back up and listened to it. It shakes the hell out of my car. You feel the bass more when it hits. But I don't think it sounds as loud as it did before. The bass sounds low and deeper. With the same box.

I tried some songs that I play to show off people my system. They didn't sound as loud as they did before. Maybe the tuning frequency of the car changed.

I don't know what to do. At first when I played one of the songs I usually play. I just thought to take the whole box out and turn it around again. But then I played some lower songs that I normally don't play. Because they weren't loud. Now they are somewhat loud. Its weird. I might have to find new songs to play.

thegreatestpenn
06-03-2009, 02:50 AM
car's tuning frequency is probably higher. try some different songs and see what is loudest now. or get on a meter and see what your new peak frequency is and go from there.

Juice0723
06-03-2009, 03:03 PM
I thought the car's tuning frequency would have went down because the lows sound louder. And there are no meters around my town. I have to drive far away to get metered. My box is tuned to 40hz by the way.

basshedz06
06-03-2009, 08:45 PM
yea your tuning frequency has changed actually it went higher where you was prolly peaking at 52 your prolly at 54 now. they change when you move the box but not by much unless you build a new box an change directions then it will.

Juice0723
06-03-2009, 11:08 PM
I peaked at 49hz before. Is there any bass in music that actually is higher then that? Could I someone tell me some songs if there is please. Thanks.

thorshammer1
06-10-2009, 03:10 PM
All of my trunk sealing has lowered my peak from 47 a lil over 2 yrs ago to 40 now.