a quote from BSW website
"We believe in our products - so we guarantee it.
Our products will make you happy. We're so sure we offer a 30 day period to enjoy your new setup. If you're not happy, we’ll give you a full refund."
I've never heard of the "if it's not in the original package" when returned to us we will not give you a full refund, as long as you have a receipt for payment is the main thing, however I accept that it may be common practice in America. I would hate it as I often return my clothes to Harvey Nicholls but never in their plastic bag as often I will have thrown it out.
Only the original poster will know how well he packaged the speakers.
I would have thought that BSW could do the decent thing and take photos of the damage surely not to much to ask of them