Magnetic or otherwise it still must conduct electricity.
I would think the material used as the conductor would allow one to determine the expected resistance in that resistance or conductivity parameters of various materials including copper silver and metals like nickel and steel that would be used in a my metal like alloy are well known.
In the case of these products one might even measure with and without magnets to compare if the magnets were removable. Or if the alloy used is known then the difference between its textbook resistance and what is measured could be attributed to the advertised magnetic conduction effect.
Or if they just work and sound great then it really does not matter how they measure I suppose.
I would think the material used as the conductor would allow one to determine the expected resistance in that resistance or conductivity parameters of various materials including copper silver and metals like nickel and steel that would be used in a my metal like alloy are well known.
In the case of these products one might even measure with and without magnets to compare if the magnets were removable. Or if the alloy used is known then the difference between its textbook resistance and what is measured could be attributed to the advertised magnetic conduction effect.
Or if they just work and sound great then it really does not matter how they measure I suppose.