I need to get a set of RCA cables for the subwoofer. I'll be using my Kicker KX650.4 to power the front comps and the sub altogether. The 4ga amp kit I got with the amp came with the KnuKonceptz "Klarity" RCA's. Should I just save my money and get another set of those, or should I upgrade both cables and get their "Karma SS" cables?