HOW To Sub in the rear deck.

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HOW To Sub in the rear deck.

Postby Team Helotes » Fri Mar 27, 2009 10:45 am

Disclaimer: This is for info only. It is not my fault it if you screw up your car. This is NOT a novice install.

You also lose the center rear seatbelt and child seat upper rear mounts. I am currently looking for a rear pull style lap belt for the rear.

Here is the step by step way to mount a sub in the rear deck.
Sub Used JL Audio 13TW5
Amp Used Alpine PDX-5


Remove rear seat.
Remove center seatbelt.
Remove rear speaker covers and speakers.
Remove rear deck carpet cover.
Remove upper child seat mounts.
Use the carpet cover as a pattern to made a rear deck out of ½” MDF.
Test fit rear deck and adjust sizes as need.
Find center of rear deck and use a Sharpie to layout a 14” x 14” square. You can use the centerline from the rear defroster in the glass to help find center.
Use a piece of cardboard to cover inside of rear window. Pull back or remove the trunk liner. Use a die grinder with a cut off wheel to cut out the hole.
Mark and drill 4 - ½” holes about 2” out from the hole on each side the hole in the rear deck.
Build a speaker box out of ¾” MDF to fit your sub. Mine needed .65 - .80 cubic feet of air space. My box is 14” x 24” x 6” outside for a total air space of .73 cubic feet.
Cut a piece of ¾” MDF 13 ¾” x 13 ¾”
Line the box up and center it below the hole you cut in the rear deck. Use a couple of drywall screws through the deck to hold it in place.
Once you have it where you want it take the MDF cut is step 11 and glue it and brad nail it to the top of the box in the hole cut in the rear deck.
Mark 4 holes to holes you drilled in step 10 they should be into the top of your sub box.
Remove the box and drill the holes you just marked. Drill them 5/16” on the inside of the sub box install 4 - ¼”x20 T- Nuts in the hole you just drilled.
Place ½ MDF deck in car and make 4 sub mount hole and speaker cutouts from the bottom.
Cut out the speaker holes to fit your speakers to you 6x9s and drill the bolt holes ½”
Install the ½” MDF rear deck and sub box with ¼” x 20 2.5”long bolts with fender washers on the top. The oversized holes will allow you to center up the sub box.
With everything bolted up use the carpet to make you another read deck out of ¾” MDF. When you get to fit like you want use a 2” Forsner bit to drill out a recess so the bolt head and fender washers will sink into the ¾” upper deck.
Cut out your speaker holes in the upper deck allow the hole to be about ¼” – 3/8” larger than the speaker. This will give you room for the vinyl or carpet.
Use a router to round over the top edges of the upper deck.
Cover the deck with vinyl.
Paint the back edge of the ½” MDF deck flat black so it does not show through the glass. Paint the box for the trunk black as well.
Install everything mounted the amp on the bottom of the sub box.
Now you have a setup as cool as mine.

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Re: HOW To Sub in the rear deck.

Postby IhadAn03 » Fri Mar 27, 2009 10:54 am

Tight. Looks good. How does it sound?
254Reese:
but i do like how the rear end of my car has held up to a couple of poundings


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Re: HOW To Sub in the rear deck.

Postby Team Helotes » Fri Mar 27, 2009 3:19 pm

Great....
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Re: HOW To Sub in the rear deck.

Postby broshi » Sat Mar 28, 2009 4:47 pm

Team Helotes wrote:Great....


igotan03 wrote:Tight. Looks good. How does it sound?



dud lol :wink:
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Re: HOW To Sub in the rear deck.

Postby messiah » Sat Mar 28, 2009 6:11 pm

I'm slightly jealous that this can't be done on the 8g's, the torsion bar in our trunk would probably get in the way.
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Re: HOW To Sub in the rear deck.

Postby ericbla03 » Sat Mar 28, 2009 7:52 pm

You did an awesome job on that. Im planning on doing this on my next car.
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Re: HOW To Sub in the rear deck.

Postby blasterrider1036 » Sat Mar 28, 2009 8:14 pm

thats real clean...looks stock
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Re: HOW To Sub in the rear deck.

Postby Javish80 » Mon Mar 30, 2009 7:51 pm

nice it looks very clean
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Re: HOW To Sub in the rear deck.

Postby anyo91 » Mon Mar 30, 2009 10:40 pm

nice job, very very clean
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Re: HOW To Sub in the rear deck.

Postby ADExternal » Tue Mar 31, 2009 8:53 am

messiah wrote:I'm slightly jealous that this can't be done on the 8g's, the torsion bar in our trunk would probably get in the way.


You can always install lifts and remove the torsion bar. Which i never understood why it wasnt like that factory.

Very nice project to do, not money comsume but takes more of the efforts. Shows your modding ability. Nice job bro
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Re: HOW To Sub in the rear deck.

Postby bloody arro » Thu Apr 30, 2009 10:40 pm

messiah wrote:I'm slightly jealous that this can't be done on the 8g's, the torsion bar in our trunk would probably get in the way.

This cant be done in the 8g's?? :cry:
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Re: HOW To Sub in the rear deck.

Postby ADExternal » Thu Apr 30, 2009 10:46 pm

ADExternal wrote:
messiah wrote:I'm slightly jealous that this can't be done on the 8g's, the torsion bar in our trunk would probably get in the way.


You can always install lifts and remove the torsion bar. Which i never understood why it wasnt like that factory.

Very nice project to do, not money comsume but takes more of the efforts. Shows your modding ability. Nice job bro
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Re: HOW To Sub in the rear deck.

Postby bloody arro » Thu Apr 30, 2009 10:54 pm

Someone should do a tutorial on how to do it to a 8g :D
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Re: HOW To Sub in the rear deck.

Postby ADExternal » Thu Apr 30, 2009 11:07 pm

I would but i hitting with dual 12"s lol
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Re: HOW To Sub in the rear deck.

Postby bloody arro » Thu Apr 30, 2009 11:21 pm

I'd be willing to do it.. But I don't have the money rofl.
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Re: HOW To Sub in the rear deck.

Postby Prophet » Fri May 01, 2009 10:45 pm

In the 8G just change the torsiner bars to shocks and get rid of the bar. Only hard part would be trying to fit anything larger then a 10 back there. Instead of using a box you could get away with a IB set up...
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Re: HOW To Sub in the rear deck.

Postby RedGalant2k1 » Sun May 03, 2009 5:12 pm

messiah wrote:I'm slightly jealous that this can't be done on the 8g's, the torsion bar in our trunk would probably get in the way.


Not at all, you can use a shallow mount sub like Infinity's flat speaker, it has like 3" inches of mounting depth for a 10" speaker that is great.
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Re: HOW To Sub in the rear deck.

Postby bloody arro » Sun May 03, 2009 8:12 pm

Hm.. I'm actually gonna look into this.

Gonna go down to the speaker store and see what they have..
I'll post another How To in the 8g section if I decide to..
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Re: HOW To Sub in the rear deck.

Postby Team Helotes » Sun May 17, 2009 10:16 pm

bloody arro wrote:Hm.. I'm actually gonna look into this.

Gonna go down to the speaker store and see what they have..
I'll post another How To in the 8g section if I decide to..


Look at the JL 13TW5 speaker. That is the one I used.
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Re: HOW To Sub in the rear deck.

Postby Z » Mon May 18, 2009 4:01 pm

looks great...
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Re: HOW To Sub in the rear deck.

Postby ericg203 » Tue Jul 28, 2009 9:50 am

Has anyone done this to an 8g yet?
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Re: HOW To Sub in the rear deck.

Postby Team Helotes » Tue Jul 28, 2009 9:59 am

ericg203 wrote:Has anyone done this to an 8g yet?



Not that I know of. No one has the balls to do it yet. LOL
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Re: HOW To Sub in the rear deck.

Postby MCHenry » Sun Oct 11, 2009 5:59 am

Mate I know this was done awhile ago.....but SWEET JESUS.....it looks standard! Good work on a VERY tidy install!
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Re: HOW To Sub in the rear deck.

Postby Team Helotes » Sun Oct 11, 2009 6:45 am

Thanks. My goal was to make it look stock.

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