For mine I put them in the garage, facing each other, out of phase and covered in duvets / blankets. Played as loud as I dare for 5 days non-stop. Took them out and tried them. Still not done. They went back in for another 5 days of the same then all done and sounding wonderful.
That is exactly how I did it. It's magic! Facing each other the music is very soft, even without covering. Move one speaker away at an angle and, boom, really loud! I think I did about 10 days also. Gives about 200+ hours.
It fully eliminates the mind games that we (at least I) tend to play about how it sounds, how much longer, etc. When I realize 240 hours is 10 days non-stop, I can't imagine how long it would be with them on sometimes. Not to mention trying to track that.
.......Pete