SDA SRS2 passive radiator rattle

brekekex

Good day all.

I recently upgraded from a set od SDA2b (black ones) to a beautiful pair of SRS2.

While listening to them, I noticed a rattle from one of the PRs.
Upon inspection, it appears that the flat radiating surface that is seen from the outside, has become unglued from the styrofoam to which it is attached.
It is still mostly secure, but I can feel a gap between the two surfaces when pressing on the outside surface.

Has anyone successfuly repaired such a failure?

Thanks all!

-Tomasz

pitdogg2

Are these the 12" passive or 15"? Most times the rattle is from a spider disconnect on the back side. The early models did seem to bubble but although ugly mostly that didn't cause a rattle. If you can get under I'd suggest you try contact cement on both surfaces let dry to tacky then let them come together. Beware you get one chance at this with contact cement.

If by chance these are 12" they come up often on eBay...15" I have never seen on eBay so proceed with caution they are mostly irreplaceable..

F1nut

As pitdogg2 stated, it's usually a loose spider that makes the rattling sound. Post a few pics of what you've got.

westmassguy

If it's not the spider, and is the front baffle that's separated from the Styrofoam, you may have difficulty gaining access to the area that needs to be repaired, due to the basket frame. If you can get to it, I would avoid using any type of solvent based glue, as this could melt the Styrofoam.

brekekex

Thanks for the responses!

They are indeed 15", and I will post pictures although the issue is a hidden one as westmassguy described what I believe is troubling my PR.
Spider appears to be solidly attached to the styrofoam structure.

So the "baffle" has unglued from the styrofoam in some spots. When pressing on the baffle, mostly in the central area of the baffle, I can hear a tacky sound, as best as I can describe it.

What adhesive do you recommend for this purpose? I have been thinking of how to tackle this repair in the least invasive manner, and only method I came up with is using a syrringe and fine needle to penetrate the styrofoam until the needle reaches the baffle then injecting an adhesive between the two.

-Tomasz

westmassguy

Hypo was my first thought, but you may have to inject through the front if possible. Not sure if the material under the foam sheet is Masonite, or Cardboard. I've never seen one apart.
I found this on a quick search: http://www.joann.com/clear-styrofoam-glue/7753940.html

brekekex

Oh my, piercing the virgin baffles makes me beyond anxious.

westmassguy

Try your way first.