If the speaker crossover or electrical device uses a capacitor of any kind, break/burn in will affect variables.

Check out this post, it is very interesting:

http://www.diyaudio.com/forums/parts/81355-capacitor-burn-break.html


SC-05, HLT6189, Oppo BDP-93, Blue Circle Audio FX2
Axiom M2v3's, QS8v3's