Speakers should not be shipped in that condition. There is nothing to hold the cone in place while the speaker carton is thrown around by the shipper. That allows the cone to move around freely and the voice coil can then rub against the magnet and scrape the insulation off of the wire. (Typically its enamel coated wire.) If you buy speakers like that again, instruct the shipper to lay the speaker on its back, center the cone and then tape it in place with a low tack tape.
That's not the best way to securely ship a cone speaker. Over the years, I sold several Altec and JBL speaker drivers, and a few were shipped to Italy.
A safe way of boxing a pair of woofers is to bolt them together face to face to protect the cones, and use bubble wrap and plastic peanuts to fill the box. When you have only one cone driver to ship, I use an MDF board to screw the driver to and which I place at the bottom of the box, then bubble wrap and plastic peanuts.
