A:OFC stands for Oxygen Free Copper, it is the most common conductor used in car audio at the moment. Copper is increasing in cost though and Copper Clad Aluminum (CCA) has continued to grow in popularity. Aisen Car Audio Cable was an earliy adopter to CCA as we saw that when used properly, CCA would make a cost effective alternative to OFC. The main difference is CCA is less conductive then OFC, so we made our CCA cable oversized to offset this difference. By using more CCA in our cable then a standard OFC model,we can offer a product at a 50% price savings and yet only have a 15% difference in performance. Making CCA a very good bang for the buck product.