Does the choice of metal inside a headphone cable have much discernible impact on sound quality? Its a debate wed 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 companys first super-conductive, oxygen-free 6N copper cable to include in-line controls for music and calls on iOS devices.
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