if yr speakers are on a carpeted floor, it is essential to use the spikes otherwise they wld wobble too much.
however, if the speakers are on a hard floor, tiled, marbled, etc, it is not necessary to use spikes. just ensure that the speaker does not wobble.
in my case, i use three cork footers stuck on the bottom of the speaker.
try this. if it does not work, fix the spikes and to prevent scratches, use coins or spike covers.