Review on Metra AX-AGL610 Axxess Ground Loop Isolator for Enhanced SEO by Steven Cox

Bought and installed two of these in my truck in December 2014. They work as advertised and have eliminated the amp crackle. However, care should be taken during installation. My front right speaker started to drop out and I determined the problem was a bad connection at the ground loop isolator. The RCA pigtail has a plug that connects to the insulator body. Mine failed where the RCA wire harness enters that little connector. If you mount them in a way that doesn't put stress on the connector, you'll probably be fine. I just pushed them back into my dashboard and they didn't work well.