Yesterday I received a new Topping D 50 DAC and ifi iPower 5V 2.5 A power supply.
The power supply cost about $50 and promotes itself as a very clean and quiet source.
However, there seems to be controversy related to the ifi power source as noted here.
I emailed ifi concerning the above issue and their response was “The iPower is ungrounded, so when one measures they should ground the setup”. I use a grounded power strip for all electrical inputs. I have an AudioQuest Jitterbug USB filter in my PC port that connects to the D50. Again, output is quiet and I don’t hear any noise.
I REALLY like the new D50 DAC and it sounds great to my ears powered by the ifi power source.
I don’t have the knowledge or equipment to make measurements myself. Has anyone got any general information about the ifi power source to alleviate my concerns?