Walk them over, I have that problem also! That is lift then up a little and with one side up move them over a little. I should have said with one corner down. Easier to do than to describe. I moved a gun safe this way once.
Is Spiking Necesarry?
I like to move my speakers around a bit for to test how they sound, so I slide them. I have the Proac D48Rs, they are kind of heavy so with the spikes in it makes it tough to move them. I haven't consciously tested or compared the sound with spikes or without them. Does it make a difference?