Most people will use those with a flat surface, and buy some sticky tackYep, that's what I did. It will stick good enough so the speaker won't fall off if you bump it or pick it up to move for some reason. And I have relatively heavy bookself speakers.
I am just wondering what keeps a bookshelf speaker on a stand.gravity.
i know i sound glib, but i'm being serious.
the idea behind spikes is to "couple" the two surfaces together. in this case, the speaker to the stand and/or the stand to the floor.
this allows for a more rigid frame...allowing the speaker drivers to move instead of the speaker itself. effectively trying to create a more "efficient" speaker.
this is...at best....questionable.
imo, the single best benefit of speaker stands is getting the tweeter up to ear level and getting the bass driver away from the floor...thereby reducing boominess.