I wouldn't put much stock in spec sheets. The C12K spec sheet I have saved on my computer lists fs as 104 Hz. The latest spec sheet on Jensen's website has it at 115 Hz.
Manufacturers change materials, change processes, move factories, etc., etc. all the time and specs change.
The only way to know for sure is to measure.
Manufacturers change materials, change processes, move factories, etc., etc. all the time and specs change.
The only way to know for sure is to measure.