Best vibration isolation for speakers on carpet?

There is no “best” - that can only be judged by the ear of the beholder - you.

in general, there are two camps, coupled (i.e., using spikes) or decoupled (i.e., usually on an elastic support such as a spring or elastomer, but sometimes on a hard support such as DH Cones or a ball bearing solution.

Back in the day, after footers became a thing, conventional wisdom was to couple with spikes with the possible exception of speakers on a suspended floor over wood joists, where a growing minority started to believe decoupling sounded better.  Currently, people seem to be split as to which option they like best.  

Within each camp, the options range from very basic or DIY-type solutions to very expensive items that are often marketed as “the one best solution.”  

Spike options range from the simple hardened steel, threaded Ramset spikes used by Sound Anchor to large brass footers from the likes of edenSound or Mapleshade.  Townshend has the most popular spring solution, although simple springs can work too.  Herbie’s products may be the most popular elastomers, but there are a variety of silicone or sorbothane based elastomeric footer products available.  You will get many specific recommendations from the folks on this site.

I have heavy PMC MB2SE on thick carpet in my HT room. Carpet sits on underlay over the concrete floor.

Any suggestions? They are quite unstable at the moment, their stands just sitting flush on the carpet. They rock all over the place. 

Thanks for your suggestions in advance.

John

@mitch2 -- Great post. In my view, "best" is one of the least helpful words in audiophilia.

Even if you suffer hearing loss the best is most obvious  here even on a cell phone.

TomD

My floorstanders weigh 210 lbs each.  They are sitting on 90 oz plush pile over a 12" 3000 psi concrete slab steel reinforced.   I am using spikes designed for the speakers.   It may not be correct but in earthquake country, it appears stable which is my first concern.   I would replace them with Townshend platforms if I wanted to.