Heres my attempt at an isolation box for my TT. For starters my TT is rather large so this box may seem overkill. The box is made of solid maple pieces. Maple is very good for vibration control. The box is 2 inches thick. It measures 6" tall x 24" deep x by 32" wide. The box is screwed together then Ii caulked the inside so no sand could escape. The box itself weighs around 60lbs. Then i filled it almost to the top with 100lbs of fine washed beach sand that I bought at Lowes for about 4 bucks a 50lb bag. Then I had a 1" thick slab of granite cut to the inside demensions of the box. I placed the granite slab inside and moved it back and forth checking it with a bubble level. Then I put the TT on top. Each material has a resonance point. Using 3 different materials sand, maple, and granite I tried to have the platform as dead as possible. Finally underneath the box are 8 2" brass cones. with the TT sitting on the box the whole thing weighs close to 275lbs. Here are some picture from the front, top, and side. They are not the best since they are from my camera phone but you get the idea. If it works out which it seems it will I will paint it gloss black and get a black granite slab to match all my other equipment, but I'm in in no hurry to do that as it weighs a ton.
