I think RCA is ok. But that with the power cable is complete nonsense. It's not copper. It's aluminum clad in copper. Big difference. It's very flexible, very soft, which means the wire isn't wrapped very tightly. I only have a small 5 channel on it. So far he's fine, but I don't trust him. I will upgrade it to a much better cable. I should have known better and just gotten something different the first time. Oh, and the little curls at the ends are trash. Just do not.
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