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?

d