>>BigJohn, I'm just asking if they have ever thought of a different model.
M3/M50. Seriously. That little dip does make a difference. If someone is listening more to pop/rock (or any genre often mixed for delivery on lower quality systems) I do suggest they would be happier with M3/M50.
I do not believe that the sibilance is being generated by the speaker but small differences in frequency response do affect how much of the sibilance you hear.
>>I’m more of a technical writer than a letter writer. In other words, I don’t know how to show emotion or friendly disagreement.
Smileys are a good start