I don't know about Krell products, but Spectral recommends only MIT cables with their equipment to decrease the risk of oscillation.
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?