Hi Andrew, thanks for your answer. I installed the PA 830 and because the sound with the wired options was not good (it was better in bluetooth - Sony mdr1000x), so, I decided to come back to the PA 828 version. I was waiting for a solution in wired, but, I think that the PA 830 does not work well for the Samsung S8+ with Android pie. I know well the great quality sound that gives Poweramp, and the PA 830 is not the problem solution. Thanks again Andrew.