I'm not sure what you mean by "unconventional materials". A traditional electromechanical speaker takes less than a minute to break in initially. During this period, the spider compliance changes. After that, it takes a few seconds of play each time you use it to break in again. Your ears would never notice the difference. I do believe however that the human auditory system becomes accustomed to the sound and the more you listen, the more details you will hear.