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How do you prove that one speaker is better than another?

Does anybody know how it can be proven that one speaker is better than another? It is easy to show that one goes higher or lower in frequency or louder but what about the overall sound quality?

For example lets take a relatively cheap bookshelf speaker that costs $500. Now lets take a very expensive bookshelf speaker such as the KEF ref one or Wilson duettes, or TAD ME1. 

How can it be shown that these expensive speakers are better than the cheap speaker? 

I understand that you can just listen to it and claim its better but that is obviously not proof thats just an opinion.
kenjit

Showing 2 responses by daros71

daros71
117 posts
 
This is probably completely wrong, but as an ignorant in this field i would do following very simple and stupid test: 
look for a decent microphone. Play PinkNoise on each speaker and record each playback under exactly the same conditions. Play the recorded recording again while recording it again. 
Do it as many times as the sound dacay differences between speakers are evident. 

daros71
117 posts
 
I think that the problem is that in the audio field it is much more complex to define a "standard" as in optics, for example with the camera-to-monitor problem. The fact that the camera-to-monitor problem is only bidimensional makes it already much simpler as the audio problem wich is 3 dimensional. 
Probably it is possible but tons of decisions have to be taken. 
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