The glitches are of the "tearing" / "rip" type, as if for a second the speaker had broken. The glitches have a certain dose of randomness. That is, the next day, when I turn on the DAC, it does not start making the same glitches at the same moments. I have also experienced them with headphones. Right now the headphone output seems completely clean. Tomorrow I will try the speakers again, which I hope have not suffered any damage from this situation. Earlier, I checked all connections, and even changed an RCA cable and tried another speaker cable with the same results. By elimination of factors I decided to check the HDPlex and there was a voltage misplaced or moved there at some point, so I can be pretty sure the problem has originated there. One thing that concerns me is that the glitches have been increasing throughout this month. First they seemed to occur only occasionally and on certain albums and then it became more widespread and continuous. The ADI-2 never turns off completely, I always leave it on stand-by but today I will do a total shutdown and tomorrow I will try the original power supply as you advise. Thank you very much.

15V, I know it is at the limit of the specifications. I am now exploring the possibility that it is a problem with the amp's electrical outlet, because I recently had a high powered fan installed in this room and the electrical outlet could be compromised. Anyway I have ordered another model of DAC from Amazon to make sure. Thank you very much.