Reddit reviews Parts Express Speaker Cabinet 3/8" Toe Spike Set 4 Pcs.
We found 1 Reddit comments about Parts Express Speaker Cabinet 3/8" Toe Spike Set 4 Pcs.. Here are the top ones, ranked by their Reddit score.
If there is padding under the carpet this is the problem. You could possibly try something like these speaker spikes to isolate the movement from the carpet.
https://www.amazon.com/gp/aw/d/B0002KR1QO/ref=pd_aw_sim_sbs_23_1?ie=UTF8&psc=1&refRID=48XRWM7WV4SM1KG2Q5C6