I didnt mention relativism, I mentioned independence.  But most pertinant is that I am not using Wittgenstein to prove my point - on the contrary I am pointing out that a logically constructed language cannot be used to describe all things.

Prove cables have electrical differences?

I proved the DCT s/cables delivered more emotion in the music to myself sufficiently to spend some money. no more no less.

Can you prove music contains emotion?  The emotion is not carried with the music in the air, the emotion doesnt exist on the disc, or at an electrical level.  It exists in the mind/heart/endocrinal response of the listener.  Is there any point trying to measure the electrical signal/pattern which will trigger this?  For the purposes of imroving MY listening experience my ears are adequate.