And somebody answered and Dave was right at it...
The burden is actually on the person who wants to prove something, not anyone else.
Sorry, that distinction doesn't work. It's a logical fallacy and has a name: shifting the burden of proof. Doing so reframes the issue incorrectly. In logic and argumentation, the burden attaches to the person making the claim, especially a positive claim. It does not attach merely to whoever asks for evidence.
If I say “this cable produces an audible improvement,” that is a positive claim about the world. The burden sits with me, or with the people selling or promoting that claim. If someone else says “I am not convinced that has been demonstrated,” they have not assumed an equal burden to disprove it. They are simply declining to accept the claim until adequate evidence is provided.
Otherwise any unsubstantiated claim becomes insulated by apathy. A person could claim that a fuse, cable riser, demagnetizer, stone, sticker, or magic dot improves sound, and then say: “Well, the burden is on skeptics because they are the ones who want proof.” That can't be right. The claim does not become evidentially neutral just because the claimant does not care to prove it.
I agree that nobody is required to prove anything in order to enjoy a hobby. If someone says, “I like this cable,” or “I enjoy what it does in my system,” that is enough. No burden. No laboratory required. But if the statement is presented as a factual audibility claim — “this cable sounds better because of its design” — then the evidence burden sits with the claimant, especially when the claim is used commercially. That's the important distinction. The person wanting proof may be motivated to run a test. But the person making the claim is still the one whose claim remains unsupported if no good evidence is produced.
-Dave

