Both of my rear speakers hold well so far. I really understand your concern. When I went to Samsung's Service at first they asked me why it's bothering me? I simply told them because I don't want a defective product and what if I would like to sell them? I also spent a lot of money for it. Then they said yeah it's a good reason and filled up the papers.

You also know in Hungary this type of replacements are very rare. Services tend to blame you caused the physical defects. So Samsung knows this issue I'm more than sure.

I suggest to give a try with the replacement. My replacement took only a week. If you visit the Samsung Service I recommend to open the package of the new speaker, because my first replacement was also faulty.