Not that I’m a fan of Klipsch, but- they may have a valid opinion on the subject, given they’ve been in the game for a while: https://www.klipsch.com/blog/how-to-break-in-a-speaker#targetText=After%20about%20100%20hours%20of,while%20others%20can%20change%20dramatically. Then there’s: https://www.cambridgeaudio.com/usa/en/blog/how-run-speakers Oh, and these guys MIGHT know a thing or two, as well: https://www.eminence.com/speaker-break-in/ Opinions on hours vary widely, as do the mechanics/materials of various drivers.
