In reply to:

I am suggesting to play them at moderate levels for a little while (don’t have a clue how long, but would suggest ½ hour), for mechanical considerations only.

A good way to err on the side of caution. Allows them to adjust to the temperature, etc of your home. Ian and Alan have both stated that it only takes a second or two for everything to "break in" but I'd think at worst, it would be overly prudent to not peg the volume control within seconds of them coming out of the back of a dark brown UPS truck in the hot Arizona sun.

Bren R.