^^^ Thanks....it was easier than I thought it would be. They send very detailed instructions with the kit. Here's a link to the one I used..it's enough for 4 speakers. They have kits for any speaker.
https://www.amazon.com/gp/product/B00CQ8P9QO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The bottom one on the front right speaker was by far the worst of the four. I was wondering why until I realized the floor furnace register is close to it. The foam was completely gone.
