When wiring a custom car audio system we need to use RCA wires to send signal between different devices. Many times though we won't use all of the RCA connections on a device. Should we leave those unused RCA ports open, or should we use these special RCA covers? Let's take a closer look! Need RCA Wires for your next Car Audio Project? Try out the "Krystal Kables" from show sponsor KnuKonceptz! Link in bio to that and my recommended tools and materials! | Car Audio Fabrication