My first thought was PVC pipe with three way elbows. Thinking more on it I came up with an even simpler design that uses a bracket at the top and bottom of the stand to hold the PVC sections and then some rubber feet to provide some isolation between the stand and the desk. The monitors came with isolation pads that could be used on the top of the stands under the monitors.
I sketched up the brackets in my CAD program and then cut them out in bamboo on my CNC machine.
|Bracket cut out on CNC machine|
|Brackets and PVC sections|
Next the top bracket is fit to the pipe in the same manner.
|Brackets and pipe assembled|
I found some rubber pan nuts that fit perfectly into the 1/2 inch PVC to be used for the isolation feet. These were just pushed into the ends of the PVC.
|Rubber pan nuts used for feet.|
They seem to do the trick nicely. They are surprisingly rigid and have no trouble supporting the monitors. Sound is improved and there is no noticeable resonance from my desk. I had planned to fill the PVC with sand to dampen any resonance in the legs but I think the monitors are effectively isolated as they are. So there you have it, simple effective and extremely low cost studio monitor isolation stands.