Mark K's Speaker Pages
...when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science...Lord Kelvin
Eton 19SD
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Eton 19SD
Two units courtesy of Paul K.
Impedance
Frequency Response
Off axis
Linear distortion
Nonlinear distortion
Unit B only at 2k
Units A and B tested at 3k, 5k, and 7k.
At 3k
At 5k
At 7k
Conclusion
Respectable numbers, but not the leader in any category. My issue with this tweeter is construction. If the faceplate is loosened it is very difficult to reposition correctly, leading to different FR and distortion patterns. Even between the above two there is notable variation in FR and distortion. For what it's worth, I had purchased a single 19sd to test earlier, and it performed worse than above. I never could get the VC/faceplate aligned to optimize FR and distortion.