Are you suggesting that they should be run at low volume as they are new ?
You must be kidding. Speakers are not like engines that need to be run in at lower speeds till they settle in. Their 'run in' or 'burn in' period only improves the sound as the surrounds and spider etc. gets more flexible with use. If you believe that capacitors etc. also need a 'burn in period' then that can be added too !