Amp2 sound popping problems


As many users here, i've got sound popping problems on my Raspberry Pi 3 Model B Plus Rev 1.3 + HifiBerry AMP2 with ropieeeXL.

Power supply is 18v / 2800Ma and i'm using two 8 Ohms speakers.

each time i increase the volume to more than 30% (on Roon), sounds popping happen every few seconds. And the temperature of the Pi seems to increase a lot (growing from 47° to 56°C in 10 minutes).

Has someone found a solution for this problem ?

Do you think it's a power supply problem ? Do i have to buy a 24v ?

Thanks for the help !

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