Yes, upon further research, I find it is oxygen free copper stranded wire that is silver coated. It would be hard to get a sonic improvement worth the time and money it would cost.
I would leave it. Tannoy does a fine job of voicing around the VdH cabling they use. The VdH cable is some of the best valued cable out there and we should all be so lucky if all speakers had that grade of cable for internal wiring.
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