Larger wire with a thinner jacket than bullz audio. Much more for your money, and the more wire, the better (to a point). It's on par with Kicker, RF, Shok, etc. Also a higher strand count depending on which line you choose, which only allows more flexibility in the wire. For a modest setup, you'll be fine with the CCA wire, which is copper clad aluminum. I'd go ahead and run 1\0 OFC and be done with it personally, but the 1\0 CCA kit will more than meet your needs, and support future expansion via a distribution block should you decide to add a 4 channel. If you're just going to be done after subs, the 4awg kit will do fine.
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