@mijostyn, not to be argumentative, I'm really curious about this. You ask about "from 10 Hz to 20 kHz at your listening position". How many speakers produce anything audible in that range? And if they could, what instruments have fundamentals there? Just as important, what music is scored with any notes within that span?
Regarding vinylvalet's suggested method for speaker break-in, what specifically is "silly" about that? I've read that procedure recommended multiple times over the years as a quicker, less-obtrusive method than simply playing them when listening. What do you suggest?
I'm not a designer, only an audio hobbyist for some decades.