We all know that sound of out-of-the-box speakers and ones that have been used for
hundreds of hours are so much different. What I curious is that. During the design process
or testing and calibrating before pack them into the boxes, How could manufacturers do such
tasks despite the speakers are so new. Some said they measure them within 0.5 dB of the
reference units. or that they measure and keep records of every one of them for future use.
But they measure them while the speakers are so new that they even make harsh sound when
played with real music.