concorde-7

@rickballard have you gotten any resolution to this issue?

If you still have trouble with the noise (and you aren't getting good support from the manufacturer) something else to try is to lend the unit to [Audio Science Review](https://www.audiosciencereview.com/forum/index.php?threads%2Fwe-measure-audio-equipment-for-free.1995%2F)...

OK that is encouraging that support has been good. I'm considering AmpliPi but am concerned about noise issues like yours (and the lack of any independent technical reviews.) I'll stay...