I am hanging a new wall using Genie Clips. After the clips, hat track, and two layers of drywall, we're talking about an added distance from the electrical boxes of over 3 inches. Quick research has lead me to electrical box extenders, but they only work for so many inches, so I will need to find another way to accommodate that distance.
I imagine the hack way to do it would be to get a thick block of wood and screw it into the stud with a few long screws then mount the electrical box onto that. I don't see any reason why that wouldn't work, but something tells me there's a better way.
Also, is there a way to mount an electrical box directly to the drywall? If so, this would be a more ideal approach for me. Since this is a huge soundproofing project, the added benefit of having electrical boxes that are detached from the studs would be an extra win even though I still bought plenty of QuietPutty.
Best Answer
Old work electrical boxes are designed to mount directly to the drywall. They have a flange that rotates out to grip the drywall from behind, pulling the box forward and tight against it:
When installing them, it's best to cut the opening with a knife (as opposed to a drywall router, say) so that the box fits snugly in the hole.