Vociferous claims of sound quality enhancement are often skeptically dismissed as due to the Placebo Effect. This is often done pejoratively.
Yet, the dictionary definition is “a beneficial effect produced by a placebo drug or treatment, which cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient’s belief in that treatment.”
In the subjectivity of audiophile music listening, is this always a bad thing?
Studies show that the Placebo Effect is often very positive (think treatment, but that it may wear off. Not good if it turns out those $3,000 interconnects provide no better sound quality.