I used 4"W hardwood around the perimeter, and plywood for the top plinth and bottom. For the top plinth, I cut separate sections of plywood for each turntable leg, in order to prevent conduction of vibration across the horizontal surface of the top plinth. The subsections are separated by 1/2" and sealed from each other with soft weather stripping. I attached 2"x 2" aluminum angles to the bottom of each plinth subsection, in order to conduct surface vibration deep into the sand. IIRC, the alum angle idea was borrowed from Galibier, but I can't be sure of that.
Sandbox Design Advice
I understand the recommended design is to build an open wooden box plus a loose lid (possibly granite) which is slightly smaller than the internal perimeter.
Fill the box with kiln dried sand, float the lid on top of the sand and then component on top.
Heavy duty sorbothane feet for the box.
There were a few design details i couldn’t find on the forum and so pl can anyone advise on:
- what size should the gap be between the lid and the perimeter?
- how deep the sand should be for a 52 kg power amp (114lbs in old money 😀)?
- i am going to use a carpenter to make it for me (pine?) and would like a professional finish in black - any suggestions?
thanks very much - advice is much appreciated.