Measuring a loudspeaker at a given input volume of, say 85 db input, from 10Hz to 20Khz does not necessarily give a realistic picture of the corresponding dynamically measured output of the speaker. For example, how different would that same data look, if one were to show the same frequency sweeps with graphs at various input/output levels, using fairly disperate input spl's. This should explain why two speakers which may measure virtually the same with an almost static input of one 'typical' spl (again 85db, across the span of 10Hz to 20Khz)may, (and oftentimes do) sound remarkably different. This is why the audition with real music is invaluable to the consumer.
This is one consideration as to why, when two people hear supposedly 'similar' speakers, similar from a 'measurement' standpoint, that they can sound so different from one another when music is applied under very different evaluation circumstances.
This is one consideration as to why, when two people hear supposedly 'similar' speakers, similar from a 'measurement' standpoint, that they can sound so different from one another when music is applied under very different evaluation circumstances.