Amp100 + DSP + Room Equalization: Rumble


I have a Raspberry 4, Amp100 and a DSP module running. I am performing a room measurement according to instructions. The created profile looks good, there is nothing unusual to see. As soon as I activate the profile, I hear a low frequency rumble when playing a song. It is not possible to use the program like this.

What can I do to change this behavior? 

Thanks for your help.


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