Hi there,

I built 2 MU 524 two months ago, tested them, everything went fine.

I wanted to use them this week and one of them had 12dB more noisefloor than the other and weird noises coming out of it.
here is a link to hear what is coming out of the unit
Left channel is the one wich seems ok, right channel is the one with the issue

http://gofile.me/6MV5G/pL4IjCWVp

Please let me know if it sounds like something you allready know

Best regards

Cdp