"Phil Allison" wrote in message

"Don Pearce"
Doki wrote:
Has anyone got any experience and suggestions of DIY
methods of isolating speakers from the floor? I'm
looking to do it to reduce the amount of noise
transferred through the floor to downstairs, rather
than as a method of altering sound quality.

This is not easy; if you make an isolation system that
works down to an adequately low frequency, it is likely
that the speakers will be unstable and wobbly. You could
always hang them from the ceiling. Anyone living above?

The cabinets are NOT responsible for shaking the floor.

Agreed.

The mass of the enclosure is usually very large compared to the mass of the
speaker cone. Newton's Law about actions and reactions is relevant. Bottom
line, the cabinet does not transmit much sound through its feet.

Problems with transmission of sound, whether laterally or vertically, are
overwhelmingly based on response to the acoustical output of the speakers.

I've seen situations where speakers have been hung on fishing line just
strong enough to not break. and they sounded and transmitted sound into
adjacent rooms identically the same as they had been situated in the same
location and orientation by more conventional means.