Aesthetix Calypso and Berning ZH270 combo noise.

Is it perhaps that the transparency of the Berning is just letting you hear the noise of the Calypso more clearly?

I have a friend here who has the Calypso and his setup is by far the most critical of cable placement than any other I have heard. He has to go through a lot of effort here to get rid of the noise....but when he does, the sound is outstanding. He feels that his Plinius may also be the culprit but perhaps it is both of these in combination. One thing for sure about the Calypso over my Callisto, the Calypso is more critical of needing ultra-quiet tubes.

Could it be because both of the amps using switch mode power supplies?