Built 3 custom homes, all on a self-proposed budget.
This one has 3 exterior walls, ( all exterior walls in the home are 2 X 6 ).
Exterior is brick, air gap, 1" styroboard foil both sides, 2X6 ( 5.5" rockwool insulation ), 2 layers (1/2" each ) of " Soundstop fiberboard, screwed in 2 separate layers, then finished with 5/8" sheetrock. 8 foot movable record shelves adorn 2/3 of the side walls. Soundlab 945 Majestics, SALLIE rear attenuators, Movable listening furniture, live plants......all-analogue.