Three of the four walls are double walled, with a 2” air space in between. The walls on the inside of the room are double 5/8 sheetrock sandwiching green glue adhesive.  Double entrance doors with an airlock prevents all but deep base from escaping the room. Purely by coincidence, the tone of the analog, vs digital is essentially the same due at least in part to the room acoustics, wood ceiling. 

The cartridge, SME head shell alignment I achieved through Yip at  Best tractor. http://mintlp.com/. This dialed it in for me. After 60-70 hours, I only needed  to change the VTA up a hair on the fly after the suspension settled in. Then it really locked in. Amazing combination. I am also using the Gold note PH-10 and its power supply, PS-10. Another jump  over anything digital I have had including the new Lotus 5 Dac.