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Post by Chris on Sept 25, 2023 11:40:53 GMT -5
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Post by speakertom on Sept 26, 2023 10:24:01 GMT -5
Great "rant" by John. He hits a lot of subjects right on the head. Although he uses measurements, the final decisions have to happen by listening. My philosophy as well. Worth the time to go through the whole thing.
Tom
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Post by larrys on Sept 26, 2023 11:24:24 GMT -5
Agreed. Great rant. The wetware in my wet, dark cave quite enjoyed it.
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Post by Chris on Dec 10, 2023 14:16:08 GMT -5
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Post by speakertom on Dec 10, 2023 15:35:43 GMT -5
Too bad Arch spends so much time beating up John. Having done lots of measurements over the years and also a lot of double blind testing, I will repeat that the starting point in speaker design should be measurements, but if someone says they can define the total sound of a speaker by measurements, don't buy a used car from them. For a lot of known reasons and perhaps some yet to be sorted out, a microphone and computer analysis does not exactly react like the ear/brain combo. The mic cannot distinguish between direct and reflected sound in a room unless gated measurements are used. Then all frequencies below around 200 Hs depending on the gate timing will be absent. The microphone will also not distinguish for example, the problems of speakers with unequal radiation patterns especially through the crossover points with changes in the direct/reflected sound ratios. There are lots of things that the mic cannot predict when it comes to your reaction to the sound field created by the speakers.
Not doing measurements can lead to what I call the "wandering in the desert" syndrome. For example if you make a change in the response at some part of the frequency range, it is common for your brain to perceive a change in another part of the response. When you then change that, the same process occurs at another point. You go on and on until the response curve is totally messed up. So my suggestion still remains that you measure first then listen.
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