I am thinking an onwall above the TV isn't the best placement as it can not be tilted down to aim at your listening position(assuming the TV midline is at seated eyelevel or higher, my 58" Panny is like this); a below placement would be better IMO.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70