I fixed a pair of Rokit 8s for a mate using this thread:
https://www.gearslutz.com/board/geekslutz-forum/1190709-shade-tree-repair-guide-fixing-crackling-static-krk-rokit-peakers.html#post12994043
Had to clean the pcbs 3 times on the one speaker, was getting 3v DC on the tweeter.
Big PITA.