Would silver cables beat UP-OCC copper?

To reduce the variables I compared short segments of 12 awg Neotech OCC copper to dead soft three-nines fine silver from Rio Grande as jumpers in Merlin VSM speakers. No spades, solder, or twist geometries to influence the evaluation.

For me high purity soft annealed silver wins decisively, and the recent decline in commodity pricing eases the pain. Consider experimenting with short segments of copper and silver in series with your speaker cables. At the line level I've had excellent results with DIY ICs made with Parts Connexion's Connex/DH Labs BL-Ag balanced silver bulk cable.

Several OEMs and DIYers have shared that soft silver is important to avoid the etched or bright quality sometimes attributed to silver. Annealing may be more significant than diminishing returns of 5-7 nines purity.

The better factory sources offer fine silver across a range of hardnesses. "Dead soft" silver implies full annealing. I suppose one could repeat the annealing process for incremental benefits or to restore softness, since silver tends to harden as it is worked. For this reason it is advisable to avoid excessive bending and twisting of silver cables.

Cryo treatment has goals unrelated to softness. No contradiction doing both.