so i started building my fiberglass enclosure. Here is the process I'm using:

1. building sub rings / base out of mdf board
2. covering the rings / base with fleece
3. coating the fleece with a layer of fiberglass resin
4. puting 2 layers of fiberglass mat on the outside of the enclosure

Now my questions are:

1.What kind of fleece should i use, thin, stretchy, not cotton? (i havent bought it yet that's why im asking now)

2. Does it matter if i put the fiberglass mat on the inside or the outside of the enclosure? (i read a tutorial that said its stronger to fiberglass the mat on the inside)

I like to use speaker grill cloth as it is far stretchier material in all directions. It is no stronger to putting it on the inside as compared to the outside IMO, what it does save is a heapload of time sanding and little to no bondo if you do it right. You can apply 3 or 4 coats of resin to the cloth and build it up nice and smooth wheres fibreglass is going to have more work associated to it to smooth it all out (for a beginner anyways).

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Rob Atkinson

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"Randomhero wrote: The xplodes sound best in a pretty large enclosure. Optimally I prefer a trash can or dumpster. "

open fiberglass resin
sniff
then sniff
then eat
then roll up in fiberglass mat

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so I can just put 3-4 coats of resin on the cloth and it would be strong enough? which means i would not have to use fiberglass at all?

what he means is that, for a beginner, putting mat onthe outside can be tricky to do if you want to end up with a semi smooth surface after your layup is complete, so that as little filler is used as possible...

The tick is to stetch the fleece, t-shit, or grill cloth (whatever you en up using), then apply a few coats of resin to the outside so that you hve a hard surface to apply you mat to the inside, so once you have put on 3-4 layers, or how everr many you are going to apply, you are left with a smooth surface on the outside which requires minimal sanding and filler to get a good finish on...

resin and fleece is not vey strong on it's own, it's only used to get the desired share before layup is started.

regards, Mark

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wow great reply! i fully understand what you guys mean now.

Yeah it is totally easier to glass from the inside. I would use stretch cloth instead of grill cloth, The stretch cloth will hold more resin so it will be stronger than the grill cloth.

your subs will sound better if you use fibre, resin alone will crack and fatigue.
thick is better for subs. l quess glassing the inside would save time.
as you work think strength of cabinet, less flex better sound. good luck

^^^ even with a set of el cheapo subs, resin and grill cloth, or fleece will blow appart, not just crack...

Mark

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did evryone forget about marglass. If you look way back in this forum, theres a thread named" just a little box" you can get a step by step on the basics

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