Equipment rack with hollow tubes.

@elizabeth  Would it be worth adding the sand even though i dont use a TT. ? I dont have anything special as far as racks that i have. In fact they were very cheap. But i did go to a granite wholesaler and got 5 pieces of 2 in thick granite cut and using them as platforms for my ARC Ref 6 on one rack , another granite platform for my Rega Isis cdp on the other rack, a granite platform for my Krell FPB 600 that sits on the floor. And 2 granite platforms to put under my B&W 800 Matrix speakers. Also using for now Vibra cones and pucks for my preamp and cdp. 

I bet you can’t hear hollow tubes ring even when you put your ear right up to them. It’s an old wives tale. I know what you’re thinking - but if I strike the hollow tube with a small hammer I can hear it ring. Solution: don’t strike the hollow tube with a small hammer while music is playing. 😛 Sand filled speakers never really caught on either for the same reason. If you’re determined to prevent ringing more elegant solutions include wrapping 2” length of the tube with viscoelastic tape or sending the tubes in the cryo lab and/or filling about 1/8 of the tube with hollow fiber wool.

@elizabeth @geoffkait .....Thanks...... I just did the test with a small hammer while i had my ear on the tube. I did not hear any ringing. I just heard a little bang from the hammer. Maybe it depends on how thin or thick the tubes are. If i did hear a ringing i would of filled them with sand also. But since i did not hear a ringing i will just leave as is.