I've been reading through the Klippel website. Klippel has done an excellent job on the science of electro-mechanics and electro-acoustics. They'd be a great company I think to help anyone understand what's going on with their electro-mechanical system.

Here's a great article from their website of DC displacement of the voice coil. A good example of that effect is the M100 HP drivers that I posted last year (link directly below). I consider what I did extreme and I am surprised nothing gave way on the six HP drivers that experienced the on-slaught.

https://www.klippel.de/know-how/mea...ement-dynamic-offset-the-voice-coil.html

https://drive.google.com/file/d/1-NnWo61RUvVFabKlDj0z_gd7jyYuQFpt/view?usp=sharing

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated