I recently moved and had the moving company do "custom crates" for heavy, expensive monitors. Turns out they charged $300 bucks for it and all it was was a guy taping some cardboard he cut on the fly to the speakers. Fortunately they weren't damaged and I got my money back but definitely go with original packaging or pay service that does this and only this.
How do pack a pair of large speakers
You disposed of the packaging material for your large speakers, and now you want to ship them safely. How would you go about this? Are there professional packaging companies that can do this kind of job without costing too much? Are there companies that do full-service packaging and LTL freight?