Shipping floor standing speakers


I have a brand new pair of PSB Imagine T2 speakers I'm going to sell. Can anyone tell me how I should ship them properly? They have never been opened and in original packaging.

Thank you
easola01
Have never had a problem with FEDEX shipping speakers weighing up to 150 pounds each (Tektons/Salk etc). I have a FEDEX business account and usually ship gear out almost every single week. NEVER had to file 1 claim in all these many years. YMMV
second layer of cardboard around the boxes. literally make a second box.

seal the second box via a high powered glue gun (for the flow rate).

this stabilizes/stiffens the whole thing into being nearly impregnable to ripping open due to any stressing and also helps enormously in preventing puncture.

I’ve even shipped dynaco A-50’s this way and also shipped many others.
If you do that, can you remove tge outer layer without damaging the original box?