Hm. Tapatalk maybe is having problems with videos? Well, you can think why the cork blocks wouldn't work (tried those) - the turntable is on a shelf already which constrains which dimensions it can move in. It can't really move up and down as the wall won't allow that more or less (I am not a "physicist" like a certain other headphone amplifier manufacturer). The problem seems to be in the other direction ("in" and "out") - add some pseudo-science, hand-waving, etc. here