Gutwire power cable conductors are made of high purity oxygen-free copper. Noise floor and background noise are to be reduced to a minimum by utilizing multiple shielding. The lower the noise floor, the clearer you can get to the essence of music. Multiple shielding is used to reject most of the EMI and RFI.
Did you know that the tightness of the jacket materials could change the sound? Gutwire jacket materials are designed to be loose. After numerous experiments, the tightness of the jacket materials does affect the sound significantly. If the jacket materials fitted the cable very tightly, the sound of music would have been very constraint and the "vividness" of music would have disappeared.