Other factors affecting sound

I'm building a dedicated room in my basement and was wondering if I should care about in wall electrical wiring and Receptacles. Do these generally make a big difference. I assume anything should be better than builders quality material. Are there any specific recommendations? What about whole house surge protection? Also, I have an option to install a second electrical box, is this helpful? I have a 5000sq ft house in suburban area with very few houses near me. I have clean and stable power. Recommendations appreciated.