Metal, aluminum, or wood for a rack ?

There are many choices. Check out the Samson Racks from Mapleshade for beauty, flexibility, and killer sound.

I built one like the Samson and couldn't be happier.

John, I checked out your "Altar" and you've got a groove going. Not sure if Maple would work, but you can get a different finish applied.

Thanks so much Kenny.
I guess my question wasn't clear.
I really wanted to know if a metal that is magnetic would cause sonic problems over a non magnetic alloy when buying or building a rack.
I looked at your rack and it would be perfect. I just need a three shelf simple rack.
All the brass all thread I've researched is very expencive.
I can almost buy a $300 rack for the price of the brass all thread.
Maybe I'll have to bite the bullet and spend the yen to make a really sturdy rack.

I use a steel rack [Star Sound] and have no trouble so I wouldn't worry about one.