It's interesting to see the movements of the panels as the music plays. I have movement in my ribbons, which I attribute to the harmonics of the tube drivers (at least partially). Is there any movement visible in the panels with the high power SS amps?
Also, the video gives the appearance of translucency. Optical illusion? Do the ribbons have some translucency or are the actual ribbons opaque/reflective.
The ribbons "move" with the tubes or SS when bass is being played, no difference.
Not an optical illusion, definitely translucent, which I happen to visually like