I would go with the whole house surge suppression breaker when you install in the panel it will go into the first Double pole slot to right of the panel. Order the one that also has 2 dedicated 20 amp breakers built in that way your sending better protection to the circuits feeding your audio equipment they cost about 100.00. I think you can buy on Amazon
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.