Thanks Martin. I think the key is to use a couple of decoupling cones and a single coupling 'cone' to provide a single 'drain path'. Perhaps something less 'wobbly' than sorbothane would be best for the decoupling task.

What have you found to be best in this role - from reading the site, I see that you've been doing some extensive experimentation!

I wonder if a single RDC cone would do well as the 'coupling' or 'drain' cone?

I guess that my situation of having the kit on a fairly massive 'shelf' (the fireplace) is somewhat unusual - and therefore difficult to extrapolate from others' experience.. I'm planning to try some 'stuff' but don't want to spend much at this stage. I do have a Vertex AQ 'coupling tripod' which is designed to act as a 'drain path' in their 'Leading Edge' support range - haven't used it yet, but perhaps will try it with some RDC cones - these look like they will provide some decoupling and act a bit like the Vertex AQ 'acoustic labyrinth' idea. (By the way, there's some interesting stuff on their web site - see the Leading Edge components section.)

Any thoughts?

Cheers. Bill