Best power cord for a preamp?

I’m presently running MIT-AC2 cables for my Spectral 30SS. they are about 10 years old. I’m looking at the newer MIT-AC2 cables. They look like they have been improved and they play well with Spectral. Might be just a lateral move?

The Hemingway  cables look very interesting to me. Read good thing about the cables. There is a posting on agon now also on what’s bests website.

Joe

What exactly are the parameters associated with a pre-amp (generally speaking) that warrant this thread?

The stock powercord

plugged into the proper power conditioner

@slaw . Lack of noise. Fast power delivery. Lowest noise will allow detail, nuance, (dynamics- as lowest sounds heard)  :)  . 

Seems impossible to figure out man