You know that there's a huge international community of hifi enthusiasts -- both subjectivists and objectivists -- who will rise up to argue with you about the audibility of cables, so I won't.
Actually, only delu... I mean, subjectivists really will. Objectivists will just mention a quick reminder that:
- speaker cables can
matter if they are too thin (ie, if their resistance isn't negligible compared to the speakers' impedance);
- interconnects can
matter too - if you have very long cable runs or a very challenging EMI/RF environment (though that's never the case for home HiFi systems).
Edit: Forgot to answer to this :
Some people will also argue that what SPCR has been reporting all these years -- about fine differences in the noise of various components, fans etc, is a lot of subjective mumbo jumbo, too, because we still cannot quantify everything we hear on the basis of measurements. Is it so hard to accept that this is also true of music/audio reproduction? (Granted, the high end audio review world is much more rife with voodoo magic than SPCR).
There are simple answers to that:
- In the audio world, the only parts that are difficult to measure objectively are speakers/headphones (because you need to record them with a microphone, in controlled conditions). Everything else (sources, preamps, amps) can be measured easily enough with an audio analyzer, with a far better precision than what our ears are capable of. At SPCR, everything you measure has to be recorded with a mic, yet you've put a lot of efforts into those objective measurements - building a semi-anechoic chamber, publishing frequency spectra and so on, to support your claims. Most audio reviewers, OTOH, don't even bother with measurements that would be much easier to do.
- If there really is an audible difference and you can't measure it (or someone disputes the validity of your measurements), you can use a double-blind test to prove your point (or disprove it). Many audio reviewers make claims about things that they would likely be unable to hear in a double blind test. If you want to make a small experience, you can pick up two fan models which, in your opinion, have a subtly different (but very close) noise signature, level-match them (set their speeds so that they have the same noise level in dBA), and check whether you can reliably tell which is which in a double-blind test... If the double blind test shows there's a real difference, then you subjective opinion wasn't mumbo-jumbo at all.
Subjective test != mumbo-jumbo.
Bad methodology in a subjective test = mumbo-jumbo.