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Originally Posted by
carloff
You want to look at distortion from about 1khz to 10khz. My guess is that the ear would be most sensitive to it in that range.
Doesn't work that way. Keyword: Intermodulation.
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The graph shows two plots. The top plot is the db/frequency response. This tell you linearity on axis but more importantly it tells you the level at which distortion is measured. For most normal listeners, we listen at most in the 80-90db range. The bottom plot is a distortion plot. It tells you how low distortion is below the signal. Since microphones can only measure so much dynamic range, these measurements aren't perfect. But it appears that even at 100db, the Three measures below audible levels of distortion in most of that range I mentioned. I don't worry too much about very low frequency distortion.
A microphone (properly designed and implemented in the test) does not have any such problems. Also, low frequency distortion is something you definetely should pay attention to as it is dominating any reasonably designed speaker.
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The distortion measurement takes all mechanical distortions into account including driver, crossover and cabinet.
Possibly even AD - DA, micpre, power amp etc. however nonlinearities from such links and also crossover + box as such is basically out of the equation.
Ferro cored inductors and electrolytics may have "significant" distortion in some cases but I don't think you find any of those in this design.
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If you looked at various distortion measurements from the NRC, you'd notice these are very good numbers.
A good resource.
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I don't think distortion measurements are THE most important measurement though. It's only part of the picture.
Yes, lots of things that can go wrong and the chain is not stronger than its weakest link. Since these "things" can be said to live in different domains it's not possible to compare them and say this one is more important than that.