Strange. Source level for all inputs should factory default to 0dB and would only change when modified by the owner.Thanks for the quick response. I found something that would make the volume work to the maximum, I don't know if it's a bug and I don't even know how long it will last ... I'll write maybe someone else suffered the phase with the volume and what solution I found a little earlier. ..in setup menu-imputs-source level- set to - 12db .... and now the volume goes all the way ... the walls are shaking !!!