Review on 🔌 Optimized for SEO: Rockford Fosgate RFIF2SW Speaker Line to Female RCA Adapter by Laura Alexander

This is a quality product. The insulation surrounding the wires is made of silicone. The wires are stranded and the ends of the wires are platinum plated so you don't have to worry about corrosion (oxidation). And yes, copper can oxidize and thus reduce the signal (voltage) delivered to your speakers. Copper is supposed to be oxygen free, but I can't say that. To understand the polarity of the wires, you need to read the product recommendations. This will tell you which wire is negative and which is positive. I've uploaded a product endorsement photo to Customer Pictures. You can download the recommendation from the company's website at www.