[simonabelamusic]

Im getting some sort electrical hum coming through to my MP573, wasnt there at when i first finished the build though has come up a couple times
in the last week or so. Not 100% sure if its from the Power supply 501 unit or the 573.

[JPK]

This is not very likely because switching power supplies do not create hum noise generally.
The MP573 is very sensitive to radiated hum, that gets in through the input transformer.
Make sure it is not placed too close to a device with a power transformer, a light dimmer, mains cables.

[simonabelamusic]

So ive trouble shoot it and it turns it out it has to be the 501 , ive taken it apart checked all connections and run all tests again but there is still a super loud buzz in the audio signal.

My MP573 is not having these issues with other power supplies, thoughts ?

[JPK]

Can you try to power the 501 with a different 12V adapter?
If there is no change, you could send us the 501 & MP573 for a check.

[kryszt1]

Hello,

did you get a solution to this problem?

I have the same issue with my IGS NE573.