Where to buy MDF board?

Rspark, You couldn't find a website for Rainwater Audio because there is isn't one. But here's the phone number: 843-665-6113.

Rspark, Lowe's carries MDF. Or you can get a Sanus Euro rack (MDF). However, in your price range you can get a much higher quality rack. I'm thinking of getting a Critical Mass rack from Rainwater Audio. It was used in some high-end rooms at T.H.E. Show in LA this year.

Rspark, Currently, my equipment is on three Sanus Euro racks. Filling the metal rack posts with sand and then screwing them together is a pain in the neck, but doable. That reduces the resonance problem in the posts. HOWEVER, the MDF shelves in the Euro are very resonant and ring like mad (even with the sand-filled posts). That in turn excites the ringing in some of the components resting on those shelves. The ringing can be easily heard by simply tapping the shelf with your knuckles. So, I've been looking for better racks. Most high-end racks are very expensive and are out of my price range. The Critical Mass rack appears to be an excellent value. Their bases are more expensive and come in three price points. To my way of thinking (and my budget), if I buy the Critical Mass rack instead of the mega-buck rack, I could take the money I saved and put it towards the Critical Mass bases. From what I hear these bases are truly outstanding. I'm in the process of finalizing my order for three Critical Mass bases with Brent Rainwater.