The surround settings do seem to be higher with speakers mounted in 'open air' stands, opppsed to near/on the wall mountings. Mine are picked up and set at 80hz, my VP150 gets set to 60hz smile . I really don't hear much of a difference with it set to 60 or 80 so I leave it at 60.

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