Onkyo's latest headphones add iOS controls to their posh copper cables

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Does the choice of metal inside a headphone cable have much discernible impact on sound quality? It’s a debate we’d struggle to contribute to, with ears as bruised as ours, but Onkyo clearly believes that such things matter. Its latest over-ears (the ES-CTI300) and in-ears (IE-CTI300) come with the …