Did you set the delay settings? If not, do this first.
Did you set the SPL with the test tones? If not, do this next.
Is it horizontally aligned with the stereo image? Listen in stereo, and pick the point where you think "center stage" is. Put the middle midrange driver of the VP150 in line with that spot.
How's the vertical alignment? The VP150 "shoots" straight out, parallel to the floor if is is sitting on a horizontal surface. If it is below your TV, it might be directing the sound at your knees. Flip it over, and it will direct the sound upwards. If it is on top of the TV, it may be directing the sound over your head. Tilt it down using door stops, the cat, a stack of old Vanilla Ice CDs, etc...
What is it sitting on? I have a 65" Mits. If the VP150 is sitting directly on it, the sound gets "enhanced" by the big empty box resonating under it. Other "boxy" things could have a sound to them as well.
Kcarlile mentioned one of the other most important things. Sound waves bounce, reflect, bend, etc.. (Remember making waves in tubs of water with various obstructions in it in science class?). Check that out also.
Go west and tweak young man...
Keep us up do date on how it's going.
