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In Reply to: RE: He is right but is referring to low level detail posted by triamp on October 12, 2012 at 14:14:29:
I suspect that there are several things going on. One is what you might call true detail, which seems to correspond to a cliff-like waterfall plot. Another is the false detail that you mention, from high frequency emphasis. Another, I think, is that some speakers have their self noise at relatively high frequencies and I think this can provide an illusion of detail. This is mostly true of electrostatics.
Finally, there are the Fletcher-Munsen curves. A speaker that is boosted in the bass and the treble has in effect built-in loudness compensation and will sound better when the volume is backed off. But it will sound wrong at natural levels. The right place for loudness compensation is in the preamp or computer, where it can be applied appropriately (or would in a calibrated system, if recordings had an absolute level reference).
And, of course, there may be some nonlinearity in the speakers themselves, as Satie points out. I'd love to do some measurements to see if I could verify that and track down the source. You could for example test for thermal effects by superimposing a small signal on a large one of a different frequency, and seeing what happens to the small signal. It should differ from IMD in that if there's for example a thermal effect, the small signal should change as a function of time.
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Follow Ups
- RE: He is right but is referring to low level detail - josh358 08:00:53 10/14/12 (0)
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