MIT cables for Spectral amps ?

You may not do damage, but you might void the warranty. Harry Pearson used Nordost speaker cables on a pair of DMA- 360s and had fine results.
I think spectral worries about speaker damage if the megahertz range of the amp is not filtered by the MIT cables. something like that.

Just thought I'd throw my .02 on this. I used to own a DMC-20 and a pair of M80 monos.

My understanding was that the amps could be damaged when using non MIT cables and that Spectral was able to identify that this was the case when a repair was required and thus not honor the warrenty. Spectral is extremely particular about their equipment.

I would double check with the dealer such as Progressive in Columbus or Spectral themselves.

I have never been a big fan of the MIT cable. MIT on Spectral gear is something very special. I would encourage you to use this combination. Where is Detlof when you need him? Spectral and MIT is pure magic.
Where are you Detlof, I need some backup on this one.