I used to have VP100 on top of a 27" CRT TV, then briefly moved it down below the TV (I forget why).

IMO the sound was more clear below the TV than above, however it may be because the mounting position below the TV was essentially "floating" on a small cardboard box, ie fewer edges to affect the sound.

Now I have graduated to a projector and a dark green wall the center speaker is staying on the box (well, I like to call it a "stand" ).

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8