Manitunc,
Don't rule out the shipper dropping the package as this happens a lot more than one would think. The package could drop and land flat, so no damage would be evident to the box or the outside of the speaker, but cause internal damage like you're speaking of mainly because of the weight of the contents.
I would think there would be visual damage outside the speaker, or at least markings if someone dropped a speaker that wasn't packaged?
Don't rule out the shipper dropping the package as this happens a lot more than one would think. The package could drop and land flat, so no damage would be evident to the box or the outside of the speaker, but cause internal damage like you're speaking of mainly because of the weight of the contents.
I would think there would be visual damage outside the speaker, or at least markings if someone dropped a speaker that wasn't packaged?