I used metal old work boxes when I ran 3 dedicated lines for my system when I bought my present house in 2002. I have never had any problems with the drywall caving in or cracking. I have plugged and unplugged from the lines probably a hundred times in the past 19 years with no problems. I am using Shunyata receptacle’s.
Old work electrical boxes
I am looking into running dedicated AC lines in my house which will require the use of old work electrical boxes, also called remodeling boxes. Since this type is supported by the drywall only, are they strong enough to avoid drywall damage when plugging or unplugging power cords into typically grippy audiophile outlets? Does anyone have a favorite brand that has worked well for them?