Cabinet

"meerzistar180 posts12-27-2016 4:38amIt insulates current, not vibration. Thats pretty clear cut. "

So was the OP's question.

" Not worried about the vibration,I can work that out. I’m concerned if there would be any unwanted frequencies from the porcelain? I also have the ventilation covered."

Porcelain (ceramics), are regularly used in all kinds of electronics. Its a very good insulator. Tube sockets, cables, speakers, diodes, resistors, electrical outlets, etc. If anything, it might be beneficial. 

Just some general info.

" List of Common Insulating Materials. Clay (ceramic)(porcelain) - This is the standard material for high voltage and RF insulators. ... It is a good thermal conductor while being an insulator. Sheet mica is easily stamped and shaped forelectrical components."