James Harris wrote:

Any ideas?

Widening the net a little....

Spikes is a concept that seems woefully short of merit, while vibration
absorbers is known and described in the literature as efficient in terms of
reducing midrange coloration via secondary radiation from the floor.
Literature reference: accellerometer measuments made by Arne E. Jensen on
his 4433 and the floor they were located on and published in the danish
magazine High Fidelity around 1978 or so.

Poul Ladegaard took this a step further by demonstrating the additional
advantage in decoupling the (midrange) loudspeaker unit from the front
panel.

It would be most interestering if the spikists have similar accellorometer
measurements that document the advantage of spikes.

James

Kind regards

Peter Larsen