General Car Audio Discussion & QuestionsAll general car audio discussion goes here. Need help installing speakers, headunits, amps or electrical? Having problems with equipment? Have questions about a product, post here.
Soldering is Feinstein going to get you the est possible connection if you're good and careful not to burn the rest of the cable.
If you're not, you can do a similar way of what you did, by stripping back the smallest amount of jacket on each of the RCA cables and do single tight loops around each opening to the shielding, and finishing with e tape and some zip ties to secure it.
Why do you ground the rca? is that just for headunits? i have never heard of doing this for amps/
Search for "pioneer pico fuse noise" or something like that and you'll get your answers. In short: there's a fuse between the signal ground and chassis ground inside the headunit. It's prone to blow, and without that connection the signal ground differential between the headunit and amp will be different, inducing noise.
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