By request. It is based on the JaZZ and arnaud mods. I am calling it the Anaxilus mod because he just sort of slapped on what materials we had lying around: Creatology adhesive foam sheets. At that time, I was using a less effective version of this mod with felt, but decided to switch to the Anax version because it was more effective at taming the treble. The circular cut actually extends slightly past the metal ring into the mesh area. The dust guards are also removed to extend the treble out a little more. EDIT: more pics by request. It just so happens that a roll of teflon tape (from Home Depot) can be used to draw the circumference of the inner cutout on the foam. Look Mommy! Real results confirmed by measurements, not voodoo. This is what it actually does to the FR. The green line is stock. The yellow line is the Anax mod. We can look at this two ways. Either it brings everything below 2.5kHz up 2-3db, or shoves everything above 2.5kHz down 2-3db. This mod is why I've avoided expensive cables for the HD800.