AVS Special Member
Join Date: Dec 2007
Location: Southern California
Mentioned: 15 Post(s)
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You want stands that are as rigid and massive as possible.
All-welded steel construction is usually best, and filling the vertical column with steel birdshot or sand is a very good idea to add mass and damping.
You can get a metal shop to make good stands from a 3-inch diameter steel tube and metal plates welded to top and bottom. You can save a lot of money that way and get very good stands.
You can get the floor spikes from many vendors including Music Direct or Amazon.