decooney,
first of all OCC and OFC are not general terms you should do your research a little bit better, OCC means ohno continuous cast, which was invented by Dr Ohno, and the process makes it so there's only one single crystal in the wire, The crystals are 125 m long so when you make interconnects or speaker wire you only get one single crystal and no crystal barriers in the wire, OFC means oxygen free copper and that has 1500 crystal barriers per foot which are little fractures in the wire that the signal has to jump across that's why OCC single crystal wire sounds so much better than OFC and that was proven over 50 years ago already.