Distortion in front passenger speaker at low frequencies.
I have an ‘03 Suburban and recently after installing CCF coupler on the back side of it against the door panel, it started distorting heavily at low frequencies. It’s a hertz speaker, and it was replaced and worked perfectly for a bit, but now has gone back to distorting. I have not put anymore CCF coupler on it, and the shop that installed the speakers says they don’t hear the issue.
If I turn all of the low frequencies to zero, there’s practically zero crackling/distortion, but what can I do to rectify this issue? It annoys the crap out of me and it’s all I can notice when music plays.
I practically have zero experience with wiring, save for a few household projects, but I’m very handy and easy to teach regardless.