AlmaataKZ:there is no specific info from Yamaha on what the foot actually does. instead, in their promotioanal email it is a headline feature (from good sound to great sound, audible improvement in sound quality) and there is a lot of words implying that this foot is very useful for sound quality.
How? no word on that.
how does this foot improve sound. in specific terms?
if there is no proper explanation or measurable effect on sound quality, it's a marketing trick.
Yes, of course you're right - the whole of hi-fi and and home cinema is a con. Well done for exposing that one.
Now go away and enjoy your model railway, take up fishing or something...