I think it's meaningful. I've not experimented with the Wilsons per se but I have with Focal inverted dome tweeters, and using felt around other tweeters.
In every case I perceived a smoother, mellower response.
My suggestion is to clean off the speakers with Goo Gone (it's great) and then get the thickest PSA backed felt you can. Get a craft hole punch the right size for the tweet. Include the tweeter surround as well (any rubber or flexible part that is attached to the moving dome.
Best,
Erik
In every case I perceived a smoother, mellower response.
My suggestion is to clean off the speakers with Goo Gone (it's great) and then get the thickest PSA backed felt you can. Get a craft hole punch the right size for the tweet. Include the tweeter surround as well (any rubber or flexible part that is attached to the moving dome.
Best,
Erik