Great product, but not perfect
"I used this to swap out the factory speaker in my old Hartke B60 combo amp. Couple of things I had to figure out to make it work. The hole spacing isn't all that accurate and I had to open the holes slightly so it would line up. The screws that come pre-installed for the new speaker are also very long and I had to swap them out for much shorter screws so I could put the grill back on. I will definitely purchase again if needed, but now I know what I will need to do before trying to just throw it on an amp or cabinet."