Received this unit with the crossover broken off the rear connectors and no sound out of the speaker. I pulled the back plate and saw that the issue was the connection of the cross over to the rear connectors and reconnected it by soldering new speaker wire in place since I needed this speaker up and running that weekend. I did not see where the cross over was originally mounted so not sure of the exact cause other than maybe shipping damage due to a less than stellar mounting design of the crossover board.