I have the factory subwoofer enclosure out of the car to replace the driver - needs to be reconed. Anyway, there are some cracks in the plastic enclosure. What I would like to do is fill in the cracks and reinforce the enclosure, not to mention replacing the port tube.

What I'm thinking of doing is using some scrap plastic and using plastic-weld compound, but I'm sure there is a better way.

Suggestions?

I know what you mean, the enclosure is a really cheep molding. I think I've bought better quality garbage cans at Dollar General... The only reason to keep it is that it fits and is hidden...
On mine, I'm planning on reinforcing the whole thing with 'glass and adding deadening material to lower the resonant frequency and add damping.
I'm not sure of the type of plastic it's molded out of, but even if you could glue it back together it will probably crack in some other places later...

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Bob Cardone
Suncoast Fieros

'85 2M6 SE Targa

I think what your talking about is made out of styrene plastic. You should be able to use the plastic bumper repair filler. Build it up a little bit on the inside to reinforce it. Make sure you rough up the inside a little with #80 grit sandpaper. Also have to use the spray on adhesion promoter on plastic first to make the filler stick to styrene type plastics. You can get the clear adhesion promoter, flex filler at auto paint supply stores/some auto parts str.

mindscape,
I've had good luck with this stuff for plastic welding.