They should be raised so the tweeter is at ear level....You can go to Home depot or a local hardware store and by some 3/4" MDF cut a pice to the same size as the speaker, then cut another about a 1" bigger for the bottom and get some 4" Plastic PVC and mounts to mount it to the MDF.
Fill with sand
You can even get some nuts and 3" bolts and make spike out of them
You should be able make these for about $35
Fill with sand
You can even get some nuts and 3" bolts and make spike out of them
You should be able make these for about $35