Wharfedale is a British loudspeaker manufacturer. The company designs its high-end speakers to last. Unfortunately, they can still break down or become damaged. When this happens, repairs by professionals can be expensive. Fortunately, you can repair some parts of the speaker at home inexpensively. First you must troubleshoot to determine exactly what the damage is. Always use the speakers as the manufacturer directs.
Disconnect the power from the speaker. This will prevent a short or electrocution.
Unscrew the speaker from its housing/box. You will find several screws -- the exact amount varies by model -- around the circumference of the front of the speaker. Unscrew them and carefully remove the speaker from the housing.
Check to make sure all the connections are in place. See if the two power wires connected to the back of the speaker are connected. If they are loose, seal the connection with electrical tape. If the wires have become frayed or damaged, replace them.
Check for cracks in the cone. The cone is the main part of the front of the speaker. It is what moves when a recording is played. If there is a crack, measure it. Cut out squares of newspaper, paper towel or construction paper large enough to fully cover the crack. Soak the squares in silicone glue and carefully cover the crack with the square. Apply as many layers as necessary until the crack is covered adequately and flush with the rest of the cone. Wait for the glue to dry, then test the speaker.