Falls es noch einen hier Interessieren sollte *g* :
ZitatDear Mr. Vogt,
the specifications of 15PZ40 and 15PZB40 are practically the same. The only difference is that 15PZB40 has a special double spider ( two single spiders glued together) to increase its mechanical strenght when large excursions are required. Since the double spider has the same compliance of the single spider used on 15PZ40, they have the same resonance frequency.
Hope this helps.
Aber bitte was is denn hier mit "spider" gemeint :???:
Gruß
Alex