The cavity behind the midrange cabinet on the back side of the speaker.
On the outside of the midrange cabinet on the back side is bitumen glued. Then the 8 mm felt is glued on to of the bitumen for damping the midrange cabinet. The cavity is filled with 4 layers of acoustilux.
https://www.buildandlisten.com/loudspeakers/cno-grand/buildprocess/71b7bbce-4a8b-4859-9760-f7dfd23048d5.jpeg/view
https://www.buildandlisten.com/loudspeakers/cno-grand/buildprocess/71b7bbce-4a8b-4859-9760-f7dfd23048d5.jpeg/@@download/image/71B7BBCE-4A8B-4859-9760-F7DFD23048D5.jpeg
The cavity behind the midrange cabinet on the back side of the speaker.
On the outside of the midrange cabinet on the back side is bitumen glued. Then the 8 mm felt is glued on to of the bitumen for damping the midrange cabinet. The cavity is filled with 4 layers of acoustilux.
