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sealing off rear deck 6x9’s

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115978
Printed Date: May 15, 2025 at 5:45 PM


Topic: sealing off rear deck 6x9’s

Posted By: drew454u
Subject: sealing off rear deck 6x9’s
Date Posted: August 29, 2009 at 5:23 AM

ALright, i asked a while ago about what i should do about the rear deck 6x9's since they are open to the trunk and my w7 beats the crap out of them. I was told to seal them off and i agree that is the best option.

So my question is what is the best way to do this??  I thought about fabbing up some some metal baskets to go underneath but i would have to weld those to the metal panel and its so thin i worry about warping it.

Has anyone else ever had to do this?? i thought briefly about putting some 6x9 boxes in the back window but i think those look tacky.

I have jl audio C2-690tx 6x9's. Would i have to worry about the space in the enclosure???

Just looking for some good ideas.




Replies:

Posted By: tommy...
Date Posted: August 29, 2009 at 7:59 AM
use some mdf and carpet...

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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!




Posted By: DYohn
Date Posted: August 29, 2009 at 9:35 AM
Don't use rear deck speakers. 

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Posted By: jimi77
Date Posted: August 29, 2009 at 2:47 PM

DYohn] wrote:

on't use rear deck speakers. 

X2



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P9 Combo
ID CD1-Pros
Focal Utopia Midbass
10" Brahma
Clarion APX amps




Posted By: drew454u
Date Posted: August 30, 2009 at 3:36 PM
DYohn] wrote:

Don't use rear deck speakers. 


why would i not want too?? i have people in my car too often not to have rear deck speakers.




Posted By: jimi77
Date Posted: August 31, 2009 at 11:59 AM

drew454u wrote:

DYohn] wrote:

Don't use rear deck speakers. 


why would i not want too?? i have people in my car too often not to have rear deck speakers.

I noticed that if I sit 3-4 feet further from a speaker I can still hear it just fine.  posted_image



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You talking to me???

P9 Combo
ID CD1-Pros
Focal Utopia Midbass
10" Brahma
Clarion APX amps




Posted By: drew454u
Date Posted: August 31, 2009 at 2:31 PM
jimi77 wrote:

drew454u wrote:

DYohn] wrote:

Don't use rear deck speakers.


why would i not want too?? i have people in my car too often not to have rear deck speakers.

I noticed that if I sit 3-4 feet further from a speaker I can still hear it just fine. posted_image




I thought the same thing too, but with the front seats blocking a direct path to the back seats, it sounds bad and not real loud.... especially with the w7 beating so loud.

The car is a 97 cutlass supreme the front speakers sit low in the door panel angled up at the passenger. I am gonna keep the rear speakers just lookin for some custom ideas.




Posted By: hot rodder
Date Posted: September 01, 2009 at 11:26 AM

You can find these isolation cones/buckets at Pep Boys. This is what the techs at the audio shop suggested for my set up. I have a LARGE cabin in my 68 Caprice 4 door and wanted to run 6 x 9's with the subs. These help isolate the sound. -Scott

posted_image





Posted By: jimi77
Date Posted: September 01, 2009 at 2:35 PM
drew454u wrote:

jimi77 wrote:

I noticed that if I sit 3-4 feet further from a speaker I can still hear it just fine. posted_image




I thought the same thing too, but with the front seats blocking a direct path to the back seats, it sounds bad and not real loud.... especially with the w7 beating so loud.

The car is a 97 cutlass supreme the front speakers sit low in the door panel angled up at the passenger. I am gonna keep the rear speakers just lookin for some custom ideas.

Yeah, if your front stage is extremely overpowered by the subwoofer already, then losing a ~2-3 db from the front stage and picking up 1-2db from the substage will can make an unbalanced system sound really bad.  With balanced/flat systems it isn't a big deal.

MDF, fiberglass, plywood, etc, etc, etc.    



-------------
You talking to me???

P9 Combo
ID CD1-Pros
Focal Utopia Midbass
10" Brahma
Clarion APX amps




Posted By: tommy...
Date Posted: September 01, 2009 at 6:33 PM
hot rodder wrote:

You can find these isolation cones/buckets at Pep Boys. This is what the techs at the audio shop suggested for my set up. I have a LARGE cabin in my 68 Caprice 4 door and wanted to run 6 x 9's with the subs. These help isolate the sound. -Scott

posted_image


What kind of battery is that...Just a regular automotive lead-acid battery...? Have also heard that w/o those enclosures around 6x9...and with subs sharing the same area/space...The 6x9 is playing/vibrating at frequencies they arent suppose to...???(thinking really hard about the explanation from mobile dynamics...Something about resonant frequency...??)



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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!




Posted By: drew454u
Date Posted: September 02, 2009 at 4:52 AM
yah something like that would work well for me, too bad there isnt a pep boys around for miles. gonna try to find something similar online.




Posted By: wolfox
Date Posted: September 02, 2009 at 6:23 AM
Crutchfield sells in-door and rear deck polyurethane foam cups for popular driver sizes. I am spoiling to get a set for my 6.5"'s (4x4 Blazer with door speakers set low) and some Dynamat while I got the doors apart. Their current price escapes memory, but a search in their accessories pages will turn them up.

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Posted By: hot rodder
Date Posted: September 02, 2009 at 9:33 AM

You can find those cups at different stores. The audio shop I bought all my stuff from was out of the 6x9 size but had plenty of 6.5 round.

To answer the battery question; yes it is a plain old lead acid battery that is on parallel with the front battery. I wanted the operating amps and CCA to be close to the front battery the car uses to keep the charging duties even. Power for the amps comes from both batteries. There are photos of the system build in the user galleries forum.

-Scott





Posted By: tommy...
Date Posted: September 05, 2009 at 8:21 AM
hot rodder wrote:

You can find those cups at different stores. The audio shop I bought all my stuff from was out of the 6x9 size but had plenty of 6.5 round.

To answer the battery question; yes it is a plain old lead acid battery that is on parallel with the front battery. I wanted the operating amps and CCA to be close to the front battery the car uses to keep the charging duties even. Power for the amps comes from both batteries. There are photos of the system build in the user galleries forum.

-Scott


So the battery vents into the trunk...then into the cabin...or did you use some type of vent tube...??



-------------
M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!





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