I would suggest that you look for other significant sources of noise within your hi-fi’s ecosystem, because the Pulse‘s performance was an indication that all is not as low noise as it could be.
If I have correctly read
@lordcloud's comments, I understand that he has listened to three streamers in his system over the past several months: Innuos Pulse, Rockna WavedreamNET and SMSL SD9. All were connected in the same manner to reduce variables.
@lordcloud preferred the SD9 and Rockna WavedreamNET. He heard clear differences among all three.
If there is noise in the system causing his "outlying" listening perception of the Innuos Pulse, then why do the other two streamers (server in the case of the WavedreamNET) sound better to him under the same conditions? Are they immune to noise affecting the Pulse? Are their circuits better filtered?
Or, is it simply possible that the Pulse sounds inherently different and he prefers the other two?
Unless one has heard the other streamers in their system, one cannot know if the differences
@lordcloud hears are due to the streamers' design/build/software or something else. Consider that if were one to hear the SD9 and Rockna WavedreamNET in their system, and have the opportunity to compare against a Pulse, one might also hear differences...and prefer the SD9 and Rockna WavedreamNET.
It's not uncommon for people to attribute a contrasting viewpoint to problems within that user's system. While problems (e.g. power delivery noise) are a possibility, I prefer to digest the comments thru the lens of listener preference, particularly in
@lordcloud's case where he compared several similar components in his system under matching conditions.
My takeaway thus far is that he just prefers the SD9 and WavedreamNET, and whatever system related problems might exist (if any) apply to all three streamers; therefore his perceptions of those streamers are due to either to inherent component characteristics, system synergy, or listener preference.