Having just taken deliver of a VX-10 sub I notice that it come with 4 small rubber feet. The sub will be placed on a fairly short pile carpet and I just wondered if that is OK. This seems to go against most speaker placement advice, which is to isolate the speaker cabinet using spikes, good stands, blutac, etc. Does this advice still stand for a sub, which is working at much lower frequencies, or should I be thinking about spiking it? Could be interesting with some of the larger, heavier beasties!!!!!!