Got my infnity kappa 12's today, they came with some kind circular disc of black foam with peeling sticky paper under it, it looks like a cup coaster, you take the circular layers and peel them off (like twizzler, lol), what is it for? No mention of it in the books, thanks.

 

I believe that goes on the back of the speaker so when youu flush mount it it will prevent any leaks. The foam acts as a seal between the speaker and the hard mounting surface.

 

Also quite possibly for the person building the box it may be used as a template.

--Don

 

thanks, I think it's there for the insulation, too small to be a template. I'll post pics when I'm done

 

It's a seal, unroll it and attach it to the trim ring around the sub before you install it. It compresses and helps to prevent leaks.