I have added aftermarket cushioning to my Hi-Fi equipment support to absorb any unwanted system vibrations. Firstly you need to buy a few squash balls and cut them in half. Next, you will notice that each individual wooden or glass shelf resting on your hi-fi rack can be lifted off. Place each 'squash ball half' under each corner of these shelves (this area of shelf would normally rest on top of the equipment rack). If you examine the photo below you will notice that I have raised the wooden shelf by hand, to expose the 'squash ball half' I have placed on the metal frame of my equipment support. VOILA you now have rack suspension!