I've never heard that or experienced any problem with 2 different sets of MIT speaker cables on Adcom 555 or my current Classe 200. And good question Bday0000.
Can speaker cables damage amplifiers?
I have been told on good authority that network cables such as TRANSPARENT and MIT can cause broad bandwith amplifiers (eg Krell) to "go into oscillation" and thereby cause some nasty damage. These cable manufacturers, apparently, are aware of this problem. Can anyone confirm this?