I'm in the process of restoring/refoaming a pair of Acoustic Research 310HO's, all 4 of the 5inch speakers need to be refoamed.
i watched a few dozen videos on how to do it and it seems pretty straight forward but i have a few questions:
1. im pretty sure the original surrounds are made from rubber but im not 100% on it, can anyone confirm?
2. the size is a bit tricky, its not 5inch. i measured about 128-130mm and the cone size is 87mm ID and 95mm OD, does it have to be the exact size or 1-2mm offset is fine?
3. is there a difference in sound between rubber vs foam surround?
4. in the pictures you will see a glue or rubber (I'm not sure) stuck on the cone edge, it doesn't really want to come off easily and stuck on there pretty good, is it ok to leave it or i need to scrape it off
5. glue, if ill go with foam surrounds i know what to get, but for rubber its a bit of a mystery. what do you recommend?
Thank you!