Back in the 70's I drove down to the IMF factory in High Wycombe with a pair of ALS40s. The midrange unit on one of them had failed and they were going to replace both of them with mark two drivers.
I didn't have the original boxes, so the speakers were lying on their backs(recessed terminals) in a hatch back with the cones facing up . I got a gentle telling off when I arrived. They reckoned that was the worst orientation for transport.