My sub slight rocks on the spikes. One spike it about 1mm too short so it wobbles every so slightly.. When I get some really deep base, the box vibrates like mad and makes a noise like the driver is blown. But its just the effect of it wobbling on the spikes and the 4th spike hitting the floor.. No matter how many times I try and adjust it, I can never get it to sit on all 4 spikes at the same time. As I have a concrete floor under the carpet, it just wont sit level. I am tempted to take them off, but worry what effect this will have on the sound. Does anyone have any thoughts?