If your amplifier cannot supply full range spectrum, then
10,000 playing hour cannot aging the speaker.
The speakers more or less like human being, you have to feed
them with good food ( nutrient ).
Full spectrum, for example from low to high with sufficient
harmonics will breakthrough all the parts including the voice
coil and the cone into the state of mature.
With good amp system (including good sound source such as
CD player), your speaker will go into mature state.
