A subwoofer combines serious weight with a large, exposed driver cone that dents at the slightest bump. The dense cabinet and powerful magnet make it heavy for its size, so lifting technique matters as much as padding. Protect that big cone and support the weight properly and the subwoofer travels without trouble.
Pro tip: A furniture dolly turns an awkward, heavy carry into an easy roll.
Watch out: The large driver cone dents easily. Cover it with the grille or a cardboard buffer that does not touch the cone.