Hidden Subwoofer Install in Trunk

[wakedude]

So this is my first real post on this thread. I thought I would share a project that I finished a couple months ago on my A4. I love sound, but hate the fact that a sub takes up so much room in the trunk. I built a custom fiberglass enclosure for a 12" shallow mount Pioneer sub.

I started out by removing everything from the trunk.


I sacrificed a spare subwoofer box that I had to make the front body of the enclosure.



Test fit...


Fiberglass mat added...


I used metal pipe strapping to give the fiber mat shape and support while the epoxy resin dried...


Final test fit. Carpet was added to the front...


Dynamat added...


Final Product.

Door closed...


Door open...



So that's it. I did the project over two days during my fall break. It sounds great and was a lot of fun. The best part is that I have all my trunk space back. Now I just need to hide the amp.

[eskimopunk]

damn. nice job man. that looks great!

[audi.a4]

pics not working for me.

[eskimopunk]

pics not working for me.

is everybody so lazy they can't just open them in a new tab or window lol? i always try that first, and generally it works.

[jimmya4]

is everybody so lazy they can't just open them in a new tab or window lol? i always try that first, and generally it works.

i cant open them at all. little square boxes with red x's in them. right click them and click show picture and nothing happens. I'm interested though try to get these pictures up for us!

[golfvdude]

Shit is clean! I like it! I don't use that compartment anyway. Would it have been better to gut out the plastic compartment and fab a box out of that? I wonder....

[golfvdude]

i cant open them at all. little square boxes with red x's in them. right click them and click show picture and nothing happens. I'm interested though try to get these pictures up for us!

I just right click and open link in another window. Everything came up.

[wakedude]

Shit is clean! I like it! I don't use that compartment anyway. Would it have been better to gut out the plastic compartment and fab a box out of that? I wonder....

I actually thought about modding the plastic compartment that was in there, but it wouldn't accommodate the 12" sub. In addition to that the structural reinforcement that would be needed to be added to the plastic would be complicated. It was much easier to start from scratch. I did use the little rubber mat that was in the base of the compartment as a starting point for creating a template.

[swoardrider]

[NorcalPB]

Lol can't see shit either.

[b7ftw]

pics dont work bro.... heres a link to the folder


ps - good call on the dynamat, but is this all you could afford? while everything is down, shoulda just done the whole trunk!


pps - i too suck at getting google pics to show properly in forums, hopefully this works

[KAISER8]

Looks Great!

I hid my Amps in that compartment.. great extra space for this :)

[whartung]

couldn't see anything except for b7ftw's picture...

[Quattro]

pretty bad fail, bump to get pics fixed!

[Quattro]

well, found link from a friend:

http://picasaweb.google.com/baschuk/...at=directlink#

[whartung]

well, found link from a friend:

http://picasaweb.google.com/baschuk/...at=directlink#

nice. looks good. How's the sound? And what about from outside the car? How much rattle is there?

[vtracer20]

^also would like to know

[wakedude]

nice. looks good. How's the sound? And what about from outside the car? How much rattle is there?

Hey, sorry about the pics. I have no idea why they aren't showing up. The sound quality is great. I have not noticed any noise from vibration or rattling. As far as the dynamat goes I just used some leftovers from a previous project that I had in my shop. It is sufficient for this install. I didn't want to dynamat the entire trunk because it would have been overkill and the extra weight was not wanted.

[golfvdude]

I actually thought about modding the plastic compartment that was in there, but it wouldn't accommodate the 12" sub. In addition to that the structural reinforcement that would be needed to be added to the plastic would be complicated. It was much easier to start from scratch. I did use the little rubber mat that was in the base of the compartment as a starting point for creating a template.

I realized that after posting. I'm guessing maybe with an 8 inch sub, it would be feasible. MAYBE a 10 in sub. Either way, that is a real clean job.

[Turn10]

awesome job, make a DIY

[SDQuattroDriver]

Looks pretty trick man, nice job!

[redlabel81]

Wow! Nice and clean! I want a setup like that.

[rickadoe]

nice!! i am in the process of adding a sub as well. i never worked with fiberglass before. was it a tough project? it would be a great diy!!

[kyee]

Nice clean install. I'm wanting to do something similar in my 2010 S4. On that same side panel I have a bunch of drives and electronics in there. Has anyone done a custom sub install on the current model A4/S4?

[cheesefan]

Damn dude that's sick!!! I have a 12" from my old car that i want to put in the A4 but don't want to take it out every time i want to put my golf clubs in my car. I would definitely pay for something like this.. you ever think about custom making these for other people or is that too time consuming?

[RJMars]

heres a diy for a different way to go about this install.

http://www.a4mods.com/index.php?page...es/stereo.html

[cyanidecologne]

Just a tip for you. Next time use either automotive carpeting or felt to build your mold. wayyyy easier than trying to make it with fiberglass mat. Just stretch it to the shape you want and apply lots of fiberglass resin to the carpet or felt. But good looking setup man nice and stealth.

[pw211]

you just need to open the pics in a new window

looks good , very clean

[A42S4]

Lol can't see shit either.

DITTO

[quattroboarder]

how did you get the fiberglass matte mold? did you make a mold off of the stock walls? or just kinda guessed it?.. starting something kinda like this as soon as i finish dynamatting my trunk

[felondnb]

looks good - any info on removing the rear panels? I'm fitting my air ride soon so will prob make use of the 12" subs I have laying around from my old A3 & build a box too.

[bharvey428]

is everybody so lazy they can't just open them in a new tab or window lol? i always try that first, and generally it works.

Thats a great tip thanks man i never knew that