My son bought a pair of Polk RTA 12b yesterday because he fell in love with my RTA 12c. After hooking them up, the 2 drivers ( mw6600x ) started popping. Changed the R & L channel wires and the same drivers popped. The other speaker is fine. Pulled the drivers out and both have the same issue, the paper cone has come loose from the spider ( if I have the right terms ). Can this be glued to fix or do we get replacement drivers. If new drivers are required, does anyone know what Polk part number would be a good replacement. Any info would be greatly appreciated.