Custom made subwoofer box
#1
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My Ride: 2004 525i Executive
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i was using a subwoofer box which was smaller than the boot and it wasnt custom, it slided around everywhere. i tried to bolt it down with brackets, it still came off!
so i went to a custom car audio specialist, they quoted me $300 on a custom made box and the order would take atleast 2 weeks and i would have to leave my car for a full day for measurements. i thought, ridiculous! so there must be something i can do?
i went to the hardware store and spent $50 on material.
this first bit here is building the box
the box is glued first with a sealant adhesive then is screwed together
![Custom made subwoofer box-p7160036.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84717d1482364994t-custom-made-subwoofer-box-p7160036.jpg)
![Custom made subwoofer box-p7160037.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84719d1482364994t-custom-made-subwoofer-box-p7160037.jpg)
i used cardboard to work out the profile of the trunk
![Custom made subwoofer box-p7160038.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84720d1482364994t-custom-made-subwoofer-box-p7160038.jpg)
i cutted the shape according to the cardboard (but refined) using a circular saw
![Custom made subwoofer box-p7160040.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84721d1482364994t-custom-made-subwoofer-box-p7160040.jpg)
here its all screwed together with self-tapping screws
![Custom made subwoofer box-p7160041.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84722d1482364994t-custom-made-subwoofer-box-p7160041.jpg)
i have found a plate in the kitchen which is at the perfect size!
![Custom made subwoofer box-p7160044.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84723d1482364994t-custom-made-subwoofer-box-p7160044.jpg)
made a hole before using the jigsaw to cut out the speakerholes
![Custom made subwoofer box-p7160045.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84724d1482364994t-custom-made-subwoofer-box-p7160045.jpg)
getting closer
![Custom made subwoofer box-p7160047.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84725d1482364994t-custom-made-subwoofer-box-p7160047.jpg)
i made a few layers of spray adhesive and left it tacky before applying the carpet on
![Custom made subwoofer box-p7160050.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84726d1482364994t-custom-made-subwoofer-box-p7160050.jpg)
the spray might not hold the edges pernamently so i decided to screw it down
![Custom made subwoofer box-p7160051.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84727d1482364994t-custom-made-subwoofer-box-p7160051.jpg)
![Custom made subwoofer box-p7160053.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84729d1482364994t-custom-made-subwoofer-box-p7160053.jpg)
![Custom made subwoofer box-p7160055.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84730d1482364994t-custom-made-subwoofer-box-p7160055.jpg)
now its time to fit these puppies in
![Custom made subwoofer box-p7160056.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84731d1482364994t-custom-made-subwoofer-box-p7160056.jpg)
![Custom made subwoofer box-p7160062.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84732d1482364994t-custom-made-subwoofer-box-p7160062.jpg)
the fitting is tight, it is rigid and stiff.
the sound quality is quite good too!
so i went to a custom car audio specialist, they quoted me $300 on a custom made box and the order would take atleast 2 weeks and i would have to leave my car for a full day for measurements. i thought, ridiculous! so there must be something i can do?
i went to the hardware store and spent $50 on material.
this first bit here is building the box
the box is glued first with a sealant adhesive then is screwed together
![Custom made subwoofer box-p7160036.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84717d1482364994t-custom-made-subwoofer-box-p7160036.jpg)
![Custom made subwoofer box-p7160037.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84719d1482364994t-custom-made-subwoofer-box-p7160037.jpg)
i used cardboard to work out the profile of the trunk
![Custom made subwoofer box-p7160038.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84720d1482364994t-custom-made-subwoofer-box-p7160038.jpg)
i cutted the shape according to the cardboard (but refined) using a circular saw
![Custom made subwoofer box-p7160040.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84721d1482364994t-custom-made-subwoofer-box-p7160040.jpg)
here its all screwed together with self-tapping screws
![Custom made subwoofer box-p7160041.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84722d1482364994t-custom-made-subwoofer-box-p7160041.jpg)
i have found a plate in the kitchen which is at the perfect size!
![Custom made subwoofer box-p7160044.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84723d1482364994t-custom-made-subwoofer-box-p7160044.jpg)
made a hole before using the jigsaw to cut out the speakerholes
![Custom made subwoofer box-p7160045.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84724d1482364994t-custom-made-subwoofer-box-p7160045.jpg)
getting closer
![Custom made subwoofer box-p7160047.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84725d1482364994t-custom-made-subwoofer-box-p7160047.jpg)
i made a few layers of spray adhesive and left it tacky before applying the carpet on
![Custom made subwoofer box-p7160050.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84726d1482364994t-custom-made-subwoofer-box-p7160050.jpg)
the spray might not hold the edges pernamently so i decided to screw it down
![Custom made subwoofer box-p7160051.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84727d1482364994t-custom-made-subwoofer-box-p7160051.jpg)
![Custom made subwoofer box-p7160053.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84729d1482364994t-custom-made-subwoofer-box-p7160053.jpg)
![Custom made subwoofer box-p7160055.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84730d1482364994t-custom-made-subwoofer-box-p7160055.jpg)
now its time to fit these puppies in
![Custom made subwoofer box-p7160056.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84731d1482364994t-custom-made-subwoofer-box-p7160056.jpg)
![Custom made subwoofer box-p7160062.jpg](https://5series.net/forums/attachments/diy-do-yourself-14/84732d1482364994t-custom-made-subwoofer-box-p7160062.jpg)
the fitting is tight, it is rigid and stiff.
the sound quality is quite good too!
#3
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Join Date: May 2008
Location: Dallas, TX
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My Ride: I have an 05 545i. It's a manual with a few options. This is my first BMW but I don't know how I'll ever be able to switch to something else.
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Great job, very clean install!
How'd you wire up the amp to the subs? I've been missing the thump in my truck and want to do this as well but I don't even know where to start with this Logic7 sound system, it's more complicated than previous systems i've worked with.
How'd you wire up the amp to the subs? I've been missing the thump in my truck and want to do this as well but I don't even know where to start with this Logic7 sound system, it's more complicated than previous systems i've worked with.
#5
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My Ride: 2004 525i Executive
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Originally Posted by kaiten408' post='947768' date='Jul 20 2009, 04:16 PM
Great job, very clean install!
How'd you wire up the amp to the subs? I've been missing the thump in my truck and want to do this as well but I don't even know where to start with this Logic7 sound system, it's more complicated than previous systems i've worked with.
How'd you wire up the amp to the subs? I've been missing the thump in my truck and want to do this as well but I don't even know where to start with this Logic7 sound system, it's more complicated than previous systems i've worked with.
#7
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My Ride: I have an 05 545i. It's a manual with a few options. This is my first BMW but I don't know how I'll ever be able to switch to something else.
![Default](https://5series.net/forums/images/icons/icon1.gif)
Nice, thanks for the tip boris, I might just have to bump this up on my to-do list. That's alot easier than I had pictured it would've been.
What kind of amp are you running with those xDs?
What kind of amp are you running with those xDs?
#10
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My Ride: 2006 BMW 530I
Model Year: 530i
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Good job!
It's also a good way to not have to spend money on coilovers to lower your car.
Save the templates and sell them to those members who are interested.
It's also a good way to not have to spend money on coilovers to lower your car.
Save the templates and sell them to those members who are interested.
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