MDF Rack dampening question

With your additional choice of materials you are now trapping more vibrations and .....over a longer period of time. Instead of allowing for and providing a path for vibrations to naturally migrate away fom your components you have provided a greater storage reservoir. Have you provided a way for self induced component vibrations or those that travel thru the air a method of retreat? Tom

The MDF itself is on the verge of providing to much damping,all that saw dust and glue. I once had a Michael Green stand which came with steel all thread rods that made the shelfs adjustable. Replacing the steel with brass made for a dramatic improvement in stage and dynamics,the rods where grounded/coupled with Audipoints. As Stan suggested I would not shut your system down with the use of sand or lead shot. Steel or brass bearings would be much better but costly. The kitty litter maybe the best value. I would fill the tubes only 1/3 at a time and then listen to the same familar recording at the same volume level, adding more each time until you hear the stage dynamics begin to shut down...and then stop. You may not get to fill the rods to the top. You will hear a difference with each additional pour. Tom

Adding mass is not all bad. Choosing the right material for that added mass is different than what we all were LEAD to believe. Mixing and matching materials and geometry is like trying to eat a soup sandwich. If the brass is doing such a good job as a conductor why use rubber products or carbon fiber? Why jumble up the phase coherency and transfer speed by using dissimular material and geometry? Transfer methods are the opposite of damping/storage methods.

Alex you need to ground that rack first to the floor. Audiopoints are what I would recommend and the only coupling device I use and sell. What size, well call Robert at Starsound. Whatever size fits then also use the APCD coupling discs under each Audiopoint for surface protection as well as an increase in surface tension, resonance capture and release. As your budget progresses apply the same ideas and methods to the components shown on the rack ..and also your speakers. Resonance transfer is the method of my choice ..no such thing as isolation. One method one singular coherent voice.