Gluing the felt in the backside cabinet.
https://www.buildandlisten.com/loudspeakers/cno-grand/buildprocess/48d725fc-1c89-4a39-bd49-95b7e4ed56eb.jpeg/view
https://www.buildandlisten.com/loudspeakers/cno-grand/buildprocess/48d725fc-1c89-4a39-bd49-95b7e4ed56eb.jpeg/@@download/image/48D725FC-1C89-4A39-BD49-95B7E4ED56EB.jpeg
Gluing the felt in the backside cabinet.