Where does this information come from?

[Pat D]

I disregard them especially if they are good because they are unable to convey any useful information. Can I interest you in a great measuring (yet dreadful sounding) Crown IC-150 preamp?



Which he said to be both rare and in this case easily audible with a high frequency edge. That's why I consider listening tests more important. There is a diference between information and knowledge.


The only data I find useful is the impedance plot to help determine amplifier compatibility. Speakers with roller coaster curves need amps with low source impedance and don't mate well with tubes - so I avoid them.

rw

Yes indeed, the impedance plot and the voltage sensitivity are useful to judge compatibility.

On the other hand, the frequency response plots and different horizontal and vertical angles are also very useful to me. These definitely can indicate differences in the sound.

The distortion plots done at the NRC for Soundstage are also useful, and of course, they do impedance and electrical phase plots as well as frequency response and horizontal dispersion, as in a rather less sophisticated fashion, Audio Ideas Guide.

If the Crown amp sounds dreadful, I have no doubt that the reasons will show up in measurements. BHK Labs for Soundstage or the Stereophile measurements would probably be sufficient.