All the above answers will work.
I'd be a bit careful on figuring out just how loud is lud though. I doubt Gallo was talking paint peeling levels here... and of course, they will run in sooner or later at lower volumes too... I've never seen a speaker that hasn't yet.
A number of olks here point to using a breakin disc. For speakers and gear.
I have always just hooked up a SS amp/reciever, turned on the cable box or radio, and let it play a continuous signal. shutting them down and restarting them periodically.
I did have one pair of Monitor Gold 60s that went 250-300 hours without much of any change... then in frustration I spun up the vol knob and VIOLIN!! They opened right on up like they had a clock in them or something or were just waiting to get wrung out.
Still do be careful applying the power.