If only Truspilot had zero stars then this company would deserve it entirely, I have Bose AV18. When the unit is powered off the 5.1 settings become inactive and goes to 2.00 until an activation of 5.1 is redone every single time the unit is turned off. I have asked Bose for help but they have refused any help whatsoever to a loyal customer. I would never buy Bose again!!!