This thing circled in the above photo is really interesting. This logo can be attached to individual speakers and it is certified for each model. In short, it means that Klippel hardware was used in the development of the particular model and Klippel hardware is ALSO used at the end of the assembly line as a quality check before every single speaker is put into a box and sold.
Rockford Fosgate co-created this certification program with Klippel to demonstrate that some speakers have more care put into them than others. This is a very high level of quality control that I have not seen before and I'm excited to be a part of it now. You can read more about that story here:
https://www.rockfordfosgate.com/news...certification/
You can also see what the requirements are to have the logo associated with a speaker here:
https://www.klippel.de/support/advertise-with-klippel.html
The date of effective terms on that page, October 2018, is when the Klippel Data usage was introduced as a way to show that measurement data and reports made using the Klippel hardware were something a little more special than normal. Fun fact: this is something I helped create : )