One reviewer claimed that the power cord was not made of copper. It is not true. Power, ground, and speaker wires are silver-tinned, oxygen-free copper. Silver plated copper wire that conducts electricity with less resistance than ordinary copper wire and is also more resistant to corrosion. But it looks like aluminum wire. So I think I can understand the confusion. The weight should dispel any doubts. I am very satisfied with this set. Loved the engine cover. A regular shell tears too easily in my opinion (hence the docked star). but I can absolutely recommend the product.
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