If the speaker was advertised as 'defective' you have no recourse. But if it was not disclosed as defective, I am sure E-bay will help you return the item. If you can return it, contact Paradigm and ask what speaker matched
the good one in production. maybe they have a range of serial numbers before they made the change.
Good Luck
the good one in production. maybe they have a range of serial numbers before they made the change.
Good Luck