Shipping floor standing speakers

Original packaging is designed to protect the speakers in transit potentially all over the world.
Unless the manufacturer is an idiot, it will do the job perfectly.

Okay thank you very much

Many people prefer to have a CLEAN Original box...for any gear. If you send it in just the original boxes dont be surprised that they get it with holes and many marks/discoloration on it.   I once sent 20K+ ARC Amps in their original WHITE BOXES and when they arrived 3 days later to the customer they were almost completely BLACK.  He took photos.  NO IDEA how the hell that happened in just 3 days.

Follow this https://forum.audiogon.com/discussions/help-large-speakers-fell-over-during-shipping  to learn what you need to know.
Strap them to a pallet!

+1 for riaa....
If you're in a position to be able to put a second box on the original packing, it would be a winner.

I used to box up speakers from the loudspeaker manufacturer I worked for, and ship around the globe. Stand mount speakers in cardboard with foam had a soft material wrapped over speakers to not scratch the finish.
His larger 165lb floor standers went into ply crates, on a baby pallet.

It was an expensive learning experience, I often wondered if a GoPro attached might show them being dropped, rolled, or heavy items dropped onto them in transit?!