JBL L100 Foam Rings Around Tweeters - Why ???????

[parisphoto]

What exactly do these rings do, and how do they do it?
TIA

[Triumph Don]

Ah..they look nice?

[parisphoto]

Round and fuzzy.
Triumph cars, bikes, or both?

[parisphoto]

Someone, please tell me, what exactly do these rings do, and how do they do it?
TIA

[pos]

they reduce diffraction around the edges of the tweeter

[robertbartsch]

I've restored a pair of studio monitors with pains-taking effort. I used a new pair of foam rings on the tweeters as part of that process. The functional purpose of the rings is limited but the restoration is complete and I'm glad I did this.

Cost? ...about 10 bucks.... so there is no good reason you should not do this, I suppose.

[parisphoto]

Thanks to all. I'm ready to install the new rings, but was curious as to their function.

[boputnam]

they reduce diffraction around the edges of the tweeter+1