Burn in discs vs. music for new speakers

I bought a $69.00 CD/DVD player and this disc, specifically for burning in things: https://www.amazon.com/Cardas-Acoustics-Irrational-Efficacious-Burn/dp/B00OY8UXME       The disc has Pink, Brown and White Noise tracks, that can be played on Repeat.      They do a great job.      There are six Seimens CCAs, that I don’t want to unnecessarily wear, in my system CDP (thus- the cheapo player).                                                 In the decades that I professionally reconed speakers (as a warranty center for EV, Altec, JBL, Cerwin-Vega, Gollehon, Cetec-Gauss and a Waldom reconing center, in Orlando, FL), I never had a repair come in, do to a sagging suspension (unless they’d gotten soaked in something).

The above doesn’t include down-firing woofers, such as might be found in a Leslie, or subwoofer system.       I have seen those sag.     Just my own experience (YMMV).        YEP: another 20 yo zombie-thread (as Ralph calls them), resurrected by someone with nothing better to do.   

The above doesn’t include down-firing woofers, such as might be found in a Leslie, or subwoofer system. I have seen those sag.

Front firing,the top of the bass driver sags/leans forward and causes polling, Kef B139’s were known for it, so were my Kef B1814 bass driver and also I believe Lowther drivers had very tight magnet/coil gap and needed to be rotated every now and again.

YEP: another 20 yo zombie-thread (as Ralph calls them), resurrected by someone with nothing better to do.

At least back then there were a lot less snake oil  fuse and hrt etc etc voodoo threads
 Burn in for speaker suspension pliability/compliance is a real thing


Cheers George

YEP: another 20 yo zombie-thread (as Ralph calls them), resurrected by someone with nothing better to do.  

+1  And it is the same knucklehead doing it over and over. 

Anyone paying attention will notice; the B139 and 1814 drivers didn’t have a round frame/front suspension.     The Physics of having flat, horizontal, mountings (in most applications), would come into play, regarding sag      But; I never saw any KEFs or Lowthers, in the shoppe, so- what do I know?      Any documentation/evidence, beside your opinion, regarding the typical, round, front firing woofer, outside of those that have been stored in boxes, face down, for extended periods of time?