Rel Does Not Recomment Isolation Stands

I can think of any number of reasons why you wouldnt want a speaker (sub or not) moving even the tiniest bit in space. What happens to the energy when you put a speaker on springs? Or is it like the Harbeth theory that the energy is drained through the vibration of the cabinet? A theory which to me makes absolutely no sense.

Yeah, a company that does ONE THING, is clueless. Sure.

Artemus_5, thanks for your response. My objective is exactly what you wrote: to “make the mains sound better.” I don’t want a sub to provide more bass per se. I’ll likely bring a REL home to see if it can live on my hardwood floors without rattling the joint.

Mapman, you ask a good question about the Auralex Subdude, the isolation platform I’ve been considering. I read the REL webpage to which Artemus linked. The Subdude has a depth of 1.75”, I believe. The REL guy said, “When you put it up, call it two inches on an isolation platform. You’re decoupling the sub from the floor and in many instances, it’s exactly the wrong thing to do.”  I don’t know whether or not that .25” difference means that the sub is decoupled from the floor when on a Subdude.

Yeah I would tend to listen to the manufacturer rather than take the advice of hobbyists myself included. There is no one size fits all in this game and the requirements of a speaker are very different than that of a turntable. Take REL's advice. 

While I suppose that REL knows what's best for REL, those theories may not be universally applicable. I have a pair of JL Audio e110 subs up on Isoacoustics pucks. They still shake the floor when they should, but with less boom and overhang. There's no substitute for experimenting.