What cable should you always have? RCA cables. And extra ones. As technology has evolved, RCA has still remained a standard for all DJ gear, controllers, mixers, and in-house systems. Because they are used so much, and constantly being stepped on and squished in your DJ bag, you want to always keep 2 of these. These are my favorite RCA cables because they are made of high-quality copper and are gold plated, but still heavy physical wear will damage even the best cables. Keep one in you back pack, keep one with your DJ gear, and another one just encase. You'll thank me later.