Make sure your speakers spikes are coupled

I have thick carpet and pad. I have always leaned on my speakers or stood on the plinths to seat the spikes into the subfloor through the carpet. I just built some 2" thick maple plinths but found no improvement in sound quality over the speakers with spikes and no plinths. I took a hammer and a block of wood and set the plinths with a cpl of good whacks over each spike. The difference is night and day. Focus, imaging, soundstage depth and width all tremendously improved. Tones are more realistic bass is much more solid and image density is also better. I sat down in my chair after setting the speakers back on the plinths and I just sat there grinning, I would have never believed this much of a difference from better contact with the subfloor. Just thought I would pass this on.
Russ