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.