Which cone's or platforms have helped?

Get one of these racks and be done with it. You don't need any cones or other isolation devices under your components. Just place them on the shelf of the rack. It is also the best looking rack on the market. Alvin at Grand Prix is a pleasure to speak to. http://www.grandprixaudio.com/

Hi, Sean, I was trying to say that you posted the thread. Neglected to say that it was Ken who did the actual recommendation. It was great to have Ken take the time to post and good to give credit where credit is due.
Maybe Tekunda is right about the "one-way" effect of spikes. When my washing machine comes on, the floors shake and so does the rack, even through the spikes.
I would says spikes are used to provide RIGID coupling of speakers to the floor. It would take an accelerometer to measure vibrations with and without spikes to really know if they are being attenuated by spikes.
The Lack and Neuance concept appears to be to stop vibration transfer through the platform. So vibrations from the CDP go into the shelf and stop. Vibrations from the floor go into the shelf and stop. That's how I understand the concept. Whether is works or not should be easy to measure with an accelerometer.

Symposium! Their rollerblocks and shelves make a dramatic difference, especially under CD players. Buy the best of their series you can afford, but even the entry level products work well.

I have a Neunce shelf under my AA cap (which made a big improvement) wondering what type of cones/footers are reommended? Ken likes the DH labs but I'd prefer something with a sharper point (less slippery) and is threaded for my cdp..thanks.