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Discussion Starter · #1 · (Edited by Moderator)
Hello all,

I have had my st for around six years and have done a few bits here and there but recently (last year) I decided to take on the challenge of having a subwoofer in the boot but unlike just buying a box I wanted a custom box that would fit in the spare alloy to retain my much needed shopping bag space.

I started with the urge to put a 12inch in but unfortunately the space required to fit a sealed box was way to small in the wheel so then had to do many weeks of research just to figure out the best shape and volume to fit a 10inch, luckily there was enough room 0.92 cubic feet of internal box space and just enough clearance for the sub.

I also decided to change the head unit for a cheapy, only to have rca output's in order to run an amplifier. I bought a used active subwoofer and stripped it down in order to make it fit the way I wanted.

Anyway I hope you enjoy my little build and perhaps it gives you some inspiration.

The space I had to work with

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The building of the box

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I used tightbond 2 to glue all the wood and in-between the gaps a mixture of sawdust and the glue

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Yep cheapy audio

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Smoothed out the inside

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Finished the internal space after painting it

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After fitting the amp and sub I was deeply unhappy with the sound and also was slightly concerned over taking up some of the internal volume which is a premium, so I decided to seal the amp hole and build a mini amp rack separately.

Unfortunately I do not have any pictures of that part of the build so all I can show you is the final result using a second hand Edge active sub that I stripped apart and used instead of the extremely poor generic active sub. At the time I was on an limited budget and also didn't know if my calculations were accurate to warrant spending a lot on an amp and sub so this was all a test of engineering and my limited skill

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The sound was good and I was enjoying the setup until my longing for the original head unit started creeping in. Now I feel I need to give you all some context I'm an older gentleman and very much old school when it comes to my audio media, I love making my own cd's and I dearly missed my factory 6cd unit and the way it looks and the whole tactile experience and I have no love for touch screens in cars, however this longing was not enough for me to do anything about it until the amp died around Christmas I believe, not entirely sure as to when due only driving bowser every now and then.

This now brings us to the current build, I knew I wanted the factory unit back in and also a complete revision of the amp/sub setup as I felt the box was far better than the two subs could get out of it and with some sort of line out converter for the stock head unit, all in a nice package that did not intrude into my limited shopping bag space.

I went about making a template to see where things would fit

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A dry fit

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Design changed due to the limited space

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Making a bracket that can be removed for the line out converter

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Making sure there are gaps all around for the carpet to fit snuggly

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The new dvc ground zero sub and the little mono vibe powering it. Hindsight I think the amp is ever so slightly underpowering it but hey, it is what it is

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Running all the new cables, what a pain in the :censored:

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After downloading test tones and setting up all the voltages from the lc2i and on the amp outputs I connected the speakers, and blew the nearside front and rear factory components smoke and everything.

Back to the online store to get some new speakers then

I was looking online for a company that would sell a package of front and rear components like the factory ones but alas I couldn't find one so decided to just get them separately and also having difficulty in finding the correct mounting brackets for my new components so I went about doing it my way instead

Old blown tweeter

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Little bit of araldite

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Stripped the new tweeter apart to fit in the existing space

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I wanted to retain the factory speaker mounts (riveted in) so cut the desired amount off the face and mounted the new speakers to them. I drilled out the original speaker plug to run the new speaker cabling through it and spent quite a while to find the best place to mount the crossover box

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I also made a mistake on some new badges which is part of another project on Bowser that will be in a different post once I'm finished so I decided to use them on the amp rack instead

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You can see the black through them, only noticed it once I had lacquered them and although they were a test piece I couldn't be bothered to sand them down again

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unfortunately I don't have any pictures of the rear but they are pretty much the same

All in and tested (nothing blown) and I have to say I am pretty pleased with the sound, the new sub is certainly getting the most of the box now.

Anyway hope you all have enjoyed the journey I have for the most part

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Discussion Starter · #2 ·
If anyone wants any further information or just some limited advice from my humble abilities I'm more than happy to assist.
 

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Looks bob on that mate. When I had a sub (not sure if you've already thought of this) I used a spare switch on the dash and made it into a power button for the sub. That way if you don't want the bass on you can just switch it off.
 

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Discussion Starter · #6 ·
Cheers man that is a great idea, I have a volume control dial supplied with the vibe mono and was thinking once the novelty has worn off slightly I would put it somewhere. I will will need to look into whether it will fit inside one of the current spare switch covers.

Today is the first day I get to drive bowser after three weeks of projects (another post soon), so I am very much looking forward to playing some loud music and feeling his power again.
 
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