Originally Posted By: wbedford
Not sure if this poster was using a spectrum analyzer, but this little test is interesting:

http://www.head-fi.org/forum/thread/51840/burn-in-techniques/30#post_593776

He managed a 0.4 hz drop, I highly doubt anyone would heaar such a drop/change in playback of actual material.

GR Research has also done some testing with their own drivers and came to the conclusion the speakers do loosen up marginaly after a few minutes/hours but they question whether anyone could ever hear the minimal differences they measured.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70