Both rear speakers behind the seats in my Crossfire are crackling.
I suspect they haven't been replaced since 2004...
Before I buy new ones, I'd like to make sure the speakers available in this offer below will definitely fit:
https://www.ebay.pl/itm/131727791234?_skw=rear+speakers+crossfire&itmmeta= 01JTF....

As for replacing the rear speakers, I found this instructional video on YouTube:

Can I have your confirmation please?
Will I need anything else?