New drivers from Beyma!

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The impedance measurement for the Beyma CD11Nd shows two large peaks(~950Hz and 1900Hz), and one small peak(~3100Hz) in the listening range.

The Faital HF108 1" compression driver, which I own, has only one large peak(~680Hz), and one tiny blip at 3300Hz.

For the CD11Nd, what construction generates the extra impedance peaks?

Several plastic domes are glued/heat_set to a high temperature Kapton voice coil former. I wondered if the 3300Hz blip on the Faital HF108 is generated by this construction.
 
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