Hello again.......is anyone else here? I was bothering you with my background noise (at 505), now I have another problem, the background noise has decreased a lot......to negligible, I can hear it softly from 3 meters with the volume at maximum (I noticed it yesterday by chance....I still give it from time to time), I can hear it now from about -10 and it increases with the volume to 0.....but even then it is much quieter. For me the problem has been solved, it doesn't bother me anymore.....anyway, the situations were rare (as I was saying......more like dwarfs on the brain ). The only change I made is a JBL subwoofer, and the electrical extension cord and the electrical cable come over the speaker cables (I had no other choice), I didn't make any changes to anything (settings, etc.). Did something break???......now I'm worried about this, is there any explanation? . Thanks in advance, and I promise not to bother you with this topic again.