Use a screwdriver and a 7/16” wrench to loosen the wire clamp
Remove the wire clamp from under the Face Ring tabs
Remove the Face Ring and wire clamp from the speaker
Remove the mounting gasket from the Sound Lens
Use a sharp blade to cut and remove the silicone tape
Use two 9/16” wrenches to loosen the jam nut
Finish unscrewing the Sound Lens by hand
Install the black rubber ring onto the new Sound Lens
Screw the new Sound Lens onto the stud. DO NOT tighten the Sound Lens by hand!
Use two 9/16” wrenches to tighten the jam nut
Tightly wrap the piece of silicone tape around the jam nuts

If your AQ339 includes a Face Ring Kit, you should now re-install it