08-11-11: Foster_9Excellent point.
The database could be set up to provide great information.... This could give audiophiles a head start on possible mistakes, especially for the inexperienced. The consistency could be in helping people avoid mistakes in their pairings when making gear choices.
As I see it the audiophile is basically acting as a systems engineer. It is generally neither necessary nor possible (given the usual unavailability of schematics and meaningful theory of operation writeups) to have a detailed understanding of the internal design of an amplifier or other component.
What is both possible and desirable is to have a good understanding of the interface characteristics of the components (input and output impedances, impedance variations with frequency, etc.), and of the end-to-end transfer characteristics of the components (gains, sensitivities, signal-to-noise ratios, etc), and of how all those things interact.
While of course none of those things will be or should be decisive in finalizing a choice of components, that kind of understanding will, as you said, decrease the likelihood of poor matchups and expensive mistakes, narrow the range of choices, facilitate diagnosing problems, and make it possible to better prioritize investments of time and money.
Best regards,
-- Al