I will try that. Now, another question...I found an used amp. Mine says that it is a TOP Hi-FI Lear L4. The seller is telling me that he has a L6 from a 2009 X5 and that this amp is an upgraded model from the L4 and should work with no issues. I saw the connectors and they are the same.

Do you guys see a problem with this?

I want to try the used one since:
1) it's is only $300 vs $1,200 new
2) I can return it if it does not work
3) What if the popping sound is not from the amp?

I will appreciate your feedback!