UPS has a freight forwarding service. You can have them pack and pallet the speakers and send it by truck or air freight. You can have the shipment crated also, which obviously costs more but is more secure.
Commercial air travel with a speaker
Does any member have experience flying domestic US commercially with a hifi speaker? Willing to buy a seat/ticket for it, I just don't want to be halfway across the country and have issues. TSA looks to be OK with it. Any real-world experience out there?