These are the RCA cables you need if your amps have balanced differential inputs. I replaced popular name brand rca cables with these NVX X series, and the sound is more lively with zero noise interference. The pin connectors fit extremely tight on both my head units preamp outs and my amps inputs. I did a lot of research on car audio rca cables before purchasing, and twisted pair are what you need when your amps have balanced differential inputs. Dont waste your money on cables offering multiple layers of shielding unless your amps dont have balanced differential inputs. NVX makes quality products, and these cables are no exception.