Quote:I'm afraid you really don't know what you are talking about. There is one technical definition of accuracy, and it is quite clear. It means that the output signal is identical to the input signal in all relevant parameters. For an amp, that means that the frequencies are identical, and all amplified equally. For a speaker, it means that the sound waves produced are exactly analogous to the electrical signal being fed to them.
Fidelity to the signal is another fair definition of accuracy, though different from the one you just cited from Harman. Still, you're now two definitions ahead of me. Although with more than one definition, it remains to be seen which one is most ...er... accurate.
Quote:What are you, Humpty Dumpty? Words do not mean whatever you say they mean.
The problem with fidelity to the signal is that it is somewhat arbitrary. If the signal is a swept tone (equal level at all frequencies), there is a good chance that it wouldn't measure as a straight line at the mixing console, let alone be perceived as flat by the recording engineer. So as long as you understand those caveats, that reproducing the signal precisely might not be what was heard and/or intended during production, then it can serve as another definition of "accurate".