OK - Jerry said that if the cone moves away from the listener (in this case, toward the magnet), then they've been recharged with the polarity reversed and will need to be demagnetized, then recharged with the correct polarity.

With regard to remagnetization, Jerry said that any Alnico magnet that has partially lost it's charge can be successfully remagnetized without being discharged to zero first. In fact, he was adamant that discharging one while there was still some magnetism left in it was totally unnecessary.

Further, he said that if, after remagnetization, the flux density in the gap should be measured to see if it is within specification tolerances, then it should be reconed and the T/S's should be carefully measured to see if they are within spec as well.

My suggestion is to:

1. Send the woofers back to GPA.
2. Tell Bill what you've found and ask him to recharge them with the correct polarity and measure the flux density once he's done.
3. Recone them and measure the T/S's to make sure they are within specifications.
4. Include a record of the above measurements when they are returned to you.

I might add that this could have easily been a simple mistake that wasn't really anyone's fault - it just happened - and that the sooner it's cleared up, the better.

I hope this helps!