Townshend Seismic Podiums

Personally, I think the pods are crazy and a total waste of money. The speakers should be mounted on quality heavy speaker stands filled with shot or atabites and spiked to a solid concrete slab floor. Blue tac should be added between stand and speaker bottom. to do anything else is overkill and not necessary. Springs under a turntable is also another obsurd idea. Why bother when you can just buy a Linn Sondek with a sprung suspension system....otherwise, a mass loaded turntable on a suitable turntable wall mounted shelf that is affixed to a solid concrete wall should suffice for vibration control.

don't believe me? - put a heavy dumbbell on your acoustics - the sound will deteriorate - it will become jammed ...

However, just like isolation produces a decolouration by helping to limit cabinet resonances, placing a tuned mass damper with absorbtion materials atop of the cabinet will realise equally a significant increase in performance.

@serjio - I know you didn't mean speaker cabinets, and your discussion has merit, I am just trying to point out one exception.

Tuned Mass Damper, some of you might want to look that up, those of you holding onto rigid methodologies. You can be stuck in the methods of the past, but once you have tasted superior engineering practices, make no mistake, you will go to church (so to speak).

@pengun & clearthinker - boing boing sounds abso-flaming-lutely glorious!

I was able to borrow some for a month while a friend was building his house. I was blown away. I build custom speakers. So I got out my accelerometer to measure vibrations of the cabinets. With and without were VERY different in the cabinet vibrations. And it was very audible. ONLY cost prevents me from purchasing my own. YMMV, but I git measurable results to back up what I was hearing in my own system.

The simplified version of how the platforms work is simple ... They find the acoustic zero of the speakers vibrations. Neither coupling or decoupling from the floor. They end up acoustically floating, without vibrations affecting the speakers any longer. It works.