Spikes.... On slab floor? Carpet? If so, I have never liked the result from this, and the issues are exactly what you are describing. Even with carpeted wood flooring.
If you have threaded inserts for the spikes in the bottoms of the speakers, look at Herbie's Audio Labs Giant Studded Glider, or Studded Gliders to replace the spikes.
If you have threaded inserts for the spikes in the bottoms of the speakers, look at Herbie's Audio Labs Giant Studded Glider, or Studded Gliders to replace the spikes.