I kind of lost track of this thread, but

1. It’s good your outlets test ok
2. I thought somewhere it was established the the frequency was not limited to your power at 50 Hz.

By the way, the power can be fine but still cause a problem if connected audio devices are plugged into different circuits. It’s best to have all your studio equipment on one circuit by itself. Lights, phones, routers etc. and especially AC should be on another.


BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors