Prior to my listening room remodel, I contacted Cryo-Nebraska who in turn locally purchased 500' of 12 gauge and 14 gauge romex at their local Home Depot, double-cryo-treated it and shipped to me which was then installed for my 4 dedicated lines.
A few other tidbits include premium wall-to-wall carpet with premium pad, few windows, no hard-surfaced furniture including tables and leather, and recessed lighting.
These few basics, good room dimensions, and proper speaker placement should be all you need for a superior room.
For everybody else in the house and neighborhood I suggest insulating all walls.
-IMO
A few other tidbits include premium wall-to-wall carpet with premium pad, few windows, no hard-surfaced furniture including tables and leather, and recessed lighting.
These few basics, good room dimensions, and proper speaker placement should be all you need for a superior room.
For everybody else in the house and neighborhood I suggest insulating all walls.
-IMO