Sure it is only 300%. Not a big deal.
Yes, and three pennies is 300% more than one penny, but it still won't buy you a cup of coffee.
BTW, it is more like 5% vs. 0.6% and it is right in the middle of the midrange.
Ummm, no. Apparently, you are the one who needs help reading a chart. The peak you reference measures 59 db, with a reference level of 90 db. That's a difference of 31 db, which puts it right at 3%. For reference, -30 d.b. equals 3.16%. The Wilson's have a peak at 400 Hz. that measures 48 d.b., with a reference level at 90. That equals -42 db., which is just below 1%. For reference, -40 db. equals exactly 1%.
And for the record, distortion is much more perceivable at the higher frequencies than in the midrange. If you knew what you were talking about, you would be more concerned about the peak at 8 khz., but then if you knew what you were talking about we wouldn't be having this discussion.
These level of distortions are VERY audible, if you know what you are listening to, which apparently, some here do not. BTW, peaks at moderate levels, will easily reach and exceed these levels.
No, sorry, but Wrong! Harmonic distortion that is measured at 3% at 90 db. in an anechoic chamber is going to be
much lower at normal listening levels. Do you have a clue how loud 90 db. at 2 meters in an anechoic chamber is? At normal listening levels, that same speaker's distortion is probably less than 1%, which is impossible to detect with the human ear. There are studies that show between 2% to 4% distortion is just barely perceivable at normal listening levels.
It is telling that Soundstage didn't feel this speaker was being driven hard enough at 90 db. to really produce much distortion, so they also provided a measurement at 95 db. to show how it performs when driven harder (and even then it didn't distort much over 4%). Interesting, the experts all seem to think that this speaker measures very well and has low distortion levels. Only you seem to think otherwise.