Re-foamed my 50year-old woofers--I ref-oamed several years ago. The refosm came somewhat undone this year. I jerry-rigged that, soon afterwards purchasing these.The butyl rings for these young-uns is better than foam--it's not invincible, though.As for the universal speaker mounting rings and cone here, the 12 enclosure hole-size, and the four Advent holes/screws fit and work superbly.More presence, efficiency, longevity result: Modern tech wins! (Why should that be a surprise?!) A great value, too!No more fooling with paper cones, foam rings, cruudy old debris, difficult model airplane glue application, old glue removal, urgency--and, straining at gnats. Move on to other projects and enjoyments....I say Proceed: Everything about logistics, install, and performance was/is great! (Every new speaker setup requires a little time to break-in.)
Rating:
[5 of 5 Stars!]