The cabinet “sounds” like your problem.
Right now I have low coffee table below my screen/150.
The receiver sits on that just missing the 150
Actually my problem like many others is the search for perfect sound.
The cabinet is a high quality unit and puts the VP180 at a perfect height with the M60s for sound but bumps the screen up in height.
There's just always going to be tradeoffs.
I actually turned the VP150 upside down yesterday to an inverted position to see how that sounds. I can't say i noticed much of large change.