I haven’t looked at the Outlaw thread in a while. As I reviewed some older posts, I noticed some people talking about the Gramma and whether it makes a difference, or not. I moved from a house with a 20x20x10 carpeted (new construction with new carpet & 1/2” foam pad) living room to the current house with a 11x24x8 living room/dining room with wood-laminate flooring. My LFM-1 EX was awesome in the carpeted living room; it sounded muddy and sloppy with the wood-ish floors (owned first house, renting current – can’t do much with placement in the second). In the current house with movies cranked up, the sub would actually move a few inches during movies as it rattled itself around on the floor (with the feet disks under the spikes). Perhaps the flooring is not finished well below the ‘wood.’ I bought the Gramma, and it made a world of difference for me (on the wood-ly floors). The bass cleaned up and no more walkie-sub. I am very happy with the Gramma, but I also don’t think it would have made much difference on my previous home’s carpeted floor. Now the only thing that rattles is the bay window in the living room
. My argument isn’t for the Gramma changing the physics of the sound waves, but for it to absorb vibrations between the sub-box and the floor from the speaker moving up and down in the cabinet on an imperfect floor.