A question of spikes...

I am building a new system, having been out of the "game" for some time. I have a pair of Stratus Goldi's (floorstanders). Not the end all speaker by any means, but I still want them to sound their best with my other equipment.

When using spikes under speakers on a carpeted floor, is it sufficent to adjust them to a height that simply gets tghe speaker's "hinnies" off the floor beneath the carpet, or is necessary to raise them so that there is a gap between the speakers and the top of the carpet pile? Also, does anyone have better experience using something like racing cones instead of spikes? What about otherwise unused amp stands? I am thinking that by using those it would disrupt the intended projection level of the speaker components. Yes, no, maybe? Thanks