Hi-fi enthusiasm predicts listening reliability better than musical training does

Evidence

When put to the test, Gabrielsson and Sjögren (1979) found that the listeners who were the most reliable and also the most observant of differences between test sounds were persons he identified as hi-fi enthusiasts, a population that also included some musicians. The worst were those who had no hi-fi interests. In the middle, were musicians who were not hi-fi oriented. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1165

Categorization

• XREF: Connects to How We Listen debates and the trained-vs-untrained listener literature in psychoacoustics; also echoes Ch. 1 contrast between objective measurement and subjective preference.
• QUESTION: Why do hi-fi enthusiasts outperform trained musicians? Is it practice in critical A/B listening versus in-performance musical attention?