Regardless of which service you use, I would suggest using a device that indicates damage and/or shock. Google freight damage & shock indicators to see what's available.
Using Greyhound bus like Dill suggested is a good choice but if you have to truck, palletize & make sure the trucking co. uses air ride trailers.
Also, some trucking co. use lift gates, so there's no dropping the speaker off the back of the truck.
Additional options are freight expediters (like All-Types Expediting) that use straight trucks that are set up for faster service. Some of these trucks are small like basic cargo vans Moving co. are another way to go, although a lot depends on the driver & crew and how they blanket wrap & strap loads.
Using Greyhound bus like Dill suggested is a good choice but if you have to truck, palletize & make sure the trucking co. uses air ride trailers.
Also, some trucking co. use lift gates, so there's no dropping the speaker off the back of the truck.
Additional options are freight expediters (like All-Types Expediting) that use straight trucks that are set up for faster service. Some of these trucks are small like basic cargo vans Moving co. are another way to go, although a lot depends on the driver & crew and how they blanket wrap & strap loads.