I agree, the top is not isolated from the bottom at all. To prove it, obtain two magnets and hold one magnet in each hand with the same poles facing each other so they repel. Move one magnet back and forth slightly to simulate a vibration. Do you feel the movement in the other magnet? If you don’t want to do the experiment, the answer is "yes".
A lot of audio products are designed for gullible audiophiles.
A lot of audio products are designed for gullible audiophiles.