Stiffening fatigued speaker spiders

[ngoclinh23]

Greeting,

I have some 70's subs which are extremely fast. Now after all of these years they are bottoming out much earlier than before. After countless close observations. I have concluded that this is due to the spiders loosing a good amount of what damping resistance they once had. Which now allows the drivers to bottom much eariler. Nothing seems to have changed other than the doping that once stiffened the spiders. So my question is what can be physically applied to restiffen these exhausted vintage spiders? I'm sure that a specific compound must exist for this sole purpose. What compound are they treated with when produced new?

Any ideas on what compounds were used?

Thanks,
Linh

 

[4-2-7]

I have some 70's subs

What subs are these? I'm not really aware of home use subs back then.

 

[4-2-7]

I think your talking about the low frequency driver called a woofer thats in a cabinet with smaller drivers. Speakers can sag over many years and low or no use. What I would do first is unscrew the drivers and flip them 180 degrees to help center them again.

We still need to know what speakers your talking about, the equipment in use and maybe the music your playing.

 

[tarior]

Clear spray paint.