So sorry, but what is it? Glue? (1 Viewer)

[JasonKZ]

Guys, I suppose I will be laying my ignorance bare here, but I have been looking at some speakers lately, and I notice a few of them have this black "glue" type substance in the middle of the woofer.
Is it supposed to be there? Is this good or bad?
I couldn't really find any pictures on-line except for on this one Sony Speaker (a little bookshelf).
http://www.video-direct.com/sony/speakers/ssmb100h.html

 

[Pete Jennings]

This is normal for many drivers. The glue is sealing the holes where wires come through the speaker cone surface and is also keeping the wires from rubbing against the cone.

Nothing to worry about!

Pete

 

[Chuck C]

For the most part, the exposed wire glue thingy is a sign of a cheap woofer. But I could be wrong!

 

[Geoff L]

On the whole this is correct, more expensive manufactures of drivers, mid,ect will be less prone to finding the bump out glue patch on the facing cone.

But even in some very high end manufacturs of speaker drivers this can be seen. So don't right off a speaker product, brand or model, because you see this. Let you ears be the judge.

More often you see this in paper and paper composite made smaller sized drivers, around 5" on down, and much less than in the polys and metal composite drivers. Seldom now in the newest of larger drivers. In the older days this was common even in the large paper woofers.