fibreglass Sub box in process

[HOLEIN1]

I wouldn't bother using two layers of MDF, i'd just get some 18mm sheet. It's the minimum i'll make a box out of.

sorry i wasnt clear when i made that point was i was at work and was in a rush yher as Sciencevr6 has said its much easier to use just a single sheet of 16-18mm Mdf rather than sticking two thinner peices together. what o originally meant was to use this method with two thick peices if he was running a much higher powered sub

Thanks heaps of your input. I kinda jumped into the project with out much facts only knowing it is enough volume running the sub and "how hard can fibre glassing be? " also only relied on a simple DIY on the web. I was so wrong.

2 ultimate questions

1. I understand what you mean about not enough resin, I only got the hang of resin : catalyst at the end. Do you think I should slap 2 more layers of fibre glass to cover up the flaws ?

2. So essentically the strength of the base and water leaks are most critical ? In this case, should I redo the base as to my flawed handywork? If I was to redo the base should I use MDF or stay with fibreglass if time & material is not a constraint?

For the power I am running is not much from what I was told, honestly I am not sure the specs actually works. I only know it is more than enough for my personal pleasure.

1) yes you will definitely need to seal up those holes, and fibreglassing them would be the way to go. not only will this seal them up but also provide more strength to the enclosure. you may want to add more than just two, however its hard to see from the pics you have posted up and depends on whether your box is flexing. two should be enough for your needs, but you may want to add few more for good measure while you got the glassing materials out

2) Im not sure what you mean by the 'base', do you mean the baffle which is basically the bit that you secre the sub into, or the actual bottom of the enclosure? if its the latter, i dont see any need to as you have already got most of the glassing done. if you are talking about the frontal side which the sub is screwed into it depends what sort of look you are after. if you use MDF you will end up with a flat faced box. another option would be to cut just a ring out, dummy it up into the position that you want, cover this with some stretchy material, and the glass over the top. this is more work, but gives you the opportunity to angle the sub slightly and a bit mmore bling.

have a look at this link, gives you more of an idea what im talking about...

http://www.girlsnmotors.co.uk/car-modifying/fibreglass-sub-box.html

just an idea

[Soundofav6]

The base as in this, because it has 2 bubbles, should I cut it out and redo it with MDF or Fibreglass again? Should I bother ??


Also thanks for the DIY always wanted know how they make those shape.

[rayray086]

It looks very neat Louis!

[HOLEIN1]

The base as in this, because it has 2 bubbles, should I cut it out and redo it with MDF or Fibreglass again? Should I bother ??

no i wouldnt bother, its not that bad and the fibreglass will fit to the car better than just a flat section of mdf, just slap a few more layers on and seal up those holes

[Soundofav6]

no i wouldnt bother, its not that bad and the fibreglass will fit to the car better than just a flat section of mdf, just slap a few more layers on and seal up those holes

Thanks mate. just slaped 2 more layers on, took your advise and used minimal catalyst and soaked fibre glass in resin before wackin' it on, now and there were are no more holes, much more easier to work around with

Managed to make the frontal part yesterday. Took me a while to figure "how to get started. I founds a massive piece of sylvine. Just prefect for the job as it can be easily carved out and strong enough to stand also use as a templet for the MDF.

Pics update.

[Golf Houso]

Looking realy good, never realy thought too much about the stereo side of things, interesting thread! Lol that fiberglass looks like an alien has just hatched out of your boot just like some sci-fi movie

[Soundofav6]

Looking realy good, never realy thought too much about the stereo side of things, interesting thread! Lol that fiberglass looks like an alien has just hatched out of your boot just like some sci-fi movie

lol.. thanks man

After feeding the women with good lunch and finished a bottle of modified grape juice.. SHE was OUT !!

Time for more work.




However, things were looking good until test fit, a massive bubble blocked a flush finish.

Should I cut and fibreglass again OR should I put make a spacer with the remaining material ????

[rayray086]

Looking good at the moment!

[The_Hawk]

Use that one as a mold then make and sell them... to people like me

[Soundofav6]

Use that one as a mold then make and sell them... to people like me

lol .. if you trust my craftmanship, very practical way of using a sub.

[Soundofav6]

My sub box is officially finished just got to do some finishing touches, mainly carpet and rounding off the edges.

I ended up using 2 layers of 16 mm of MDF and a another space. all becasue of my mis-calculation lol.. suppose it would be cheaper than cutting and reparing with fibre glass again.

Thanks to my local audio place, got a scrap carpet!!! just enough for this project. Your a top bloke Paulie !!!

As to mounting, I placed those "suction mat" on the base and with the flush sitting on the top of the fibre glass to the parcel shelf, I didn't have to drill holes to mount. It is as steady as a horse's stance..

materials.
5 Litres of Resin
20 mL catylst.
3 x standard MDF
1 x Glaze silicon
1 x craft glue.
MANY MANY gloves.
5 x brushes
~ 9 metre square of fibre glass ( luck I had exsisting which are over 10 years old. )

Total including fibre glass less than $300.

probably save a 1/4 if price if I was to do it again. the amount of materials I wasted


My 2 min wiring job.


Still got to dig a deeper trench. (Dremel is my new best friend lol )


Finish product. glueing the carpet on tomorrow.

[Soundofav6]

Carpet job was actually easier than expected. PVA Glue and millions of nails worked just fine.

THE END

PS You guys made the job so much easier, thank you all for your input, help and suggestions.

[HOLEIN1]

Total including fibre glass less than $300.

where did you get your fibreglass materials from? $300 seems a little rich, however would probably work out of you bought them from a hardware store etc etc

best place to get this stuff from are distributors or boat builders who are usually happy to sell materials to the public - works out a hell of a lot cheaper

finished job looks good mate, well done

[Lorenz]

Wow, nice finished product mate, love it
Was wondering if you could put a sub there, and you have now proved you can and its so neatly done!
Been looking for some way to mount a sub in the back of the MK3, without taking up too much spare and out of the way somewhere, and this is just PERFECT Might give it a go my self at some point!

[Soundofav6]

where did you get your fibreglass materials from? $300 seems a little rich, however would probably work out of you bought them from a hardware store etc etc

best place to get this stuff from are distributors or boat builders who are usually happy to sell materials to the public - works out a hell of a lot cheaper

finished job looks good mate, well done

Thanks for the comment guys.

I always wonder where I can get fibre glass from. I was luck to have exsisting fibre glass in the garage a whole bag full of it. Bunnings sells a square meter for $25, there is no way I can afford that, I am guessing I used and wasted about 9 square metres. The fibre glass I had, looks differernt to ones sold at bunnings. Bunning's fibre glass looks thicker and interwoven into a sheet whereas mine looks thin with fibres in random direction and press into sheet.

So next project, where should I get fibre glass from? Surely I can get fibreglass for cheaper than $25 per square meter. Knowing my father, he would not have $300 worth of material lying around.