The usual 2 ways....
Badly or correctly.
Will likely cost about the same if the shipper even considers the first...perhaps more on the advised insurance...
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?