Don't be misled by silly opinions, like "NO spikes".
If your speakers rest on a concrete floor, you can't do better than to couple the speakers to the floor as solidly as possible. Spikes lead to more adjustability than concrete bolts, so spikes are a definite alternative in such a case.
I have a rack of electronics in my HT, and it's on casters for reasons similar to yours. It can be made solid by screwing down 5/8" bolts through the bottom shelf to elevate it off the casters. Works fine, takes 2 minutes to make it ready to move, and two minutes more to anchor it.
You can easily do the same thing with a solid block like a maple butcher block. Four bolts, one on each corner (holes drilled and tapped for the bolts); 4 casters, one in the middle of each side. Just fix your speaker to the butcher block, and you're done.
But if your floor is wood, forget it. Locking casters will be better. IMO
Good Luck!
If your speakers rest on a concrete floor, you can't do better than to couple the speakers to the floor as solidly as possible. Spikes lead to more adjustability than concrete bolts, so spikes are a definite alternative in such a case.
I have a rack of electronics in my HT, and it's on casters for reasons similar to yours. It can be made solid by screwing down 5/8" bolts through the bottom shelf to elevate it off the casters. Works fine, takes 2 minutes to make it ready to move, and two minutes more to anchor it.
You can easily do the same thing with a solid block like a maple butcher block. Four bolts, one on each corner (holes drilled and tapped for the bolts); 4 casters, one in the middle of each side. Just fix your speaker to the butcher block, and you're done.
But if your floor is wood, forget it. Locking casters will be better. IMO
Good Luck!