Advice or experience with shipping speakers using freight companies

Possibly of interest 

Freight won't be less expensive.

yes indeed

i used freightquote/ch robinson ltl trucking to bring me my big maggies from the midwest - got the job done well but was not cheap.... emphasis on:  not cheap 🤣

Use roadway 

Palletize and call echo logistics. Same company Legacy Audio uses to ship their large speakers. I've also used them on several occasions and am very satisfied.

Freightcenter. Com