I have never owned a speaker in 40 years where you cannot feel vibes when playing loud no matter the design. It is no different than a kick drum Piano, or violin when you play them it is part of sound and wooded bodies and pressure, etc. You can build a speaker with mass that will be dead on the outside, but you still would have pressure inside around the drivers. There are so many other colorations in your room and gear, cables, etc. that impact how any speaker sounds in one's room. I have added weight on top of my speakers at times to good effect, spikes or type of spikes or any footer or platform you are changing one type of coloration some bring out the mids more, the highs, tighten up the bass, etc. I've found fixing the room makes huge improvements. I've found using the taller spikes that come with the Sapphires on the back of the speaker below the crossover, and the 2 shorter ones on the front in my deep carpeted audio loft area were much, much better than the short one that did nothing due to the spike being long enough to piece the carpet to the subfloor. Touching the speakers had much lower vibes than before, with the longer spike on the back of the speaker, more detail, body, and dynamics across the board. I think the idea was most would be using these on wood floors with the small spike would have no problem contacting the floor. But carpets cannot.