You can repair the hole using a flexible permanent adhesive. If all of the cone is still there, I wouldn't use a patch. I'd just put the jagged edges back together. If part of the cone is actually missing, you will need to patch it. Thin fiberglass cloth works pretty well. Use painters tape that will remove easily and cover the hole from the rear of the speaker. Cut the fiberglass cloth about 1/4" larger than the hole and attach it using a silicone based flexible adhesive. Allow it 24 hours to set up completely and then remove the tape from the rear.
A product called "shoe goo" works very well for speaker repairs. It's strong, flexible, and permanent.
Answers & Comments
Hello colinomalley,
You can repair the hole using a flexible permanent adhesive. If all of the cone is still there, I wouldn't use a patch. I'd just put the jagged edges back together. If part of the cone is actually missing, you will need to patch it. Thin fiberglass cloth works pretty well. Use painters tape that will remove easily and cover the hole from the rear of the speaker. Cut the fiberglass cloth about 1/4" larger than the hole and attach it using a silicone based flexible adhesive. Allow it 24 hours to set up completely and then remove the tape from the rear.
A product called "shoe goo" works very well for speaker repairs. It's strong, flexible, and permanent.
Hope this helps.