The GRK appear like they can easily hold the weight. I don't think there are going to be any problems. Now the question has come down to designing what where and how the speaker rests on the wall.
I'm thinking that some minimal 1/8" to 1/4" pads that float the 5x4ft off the wall just a touch, and provide a wider compression from drywall to to stud. Now do I simply make holes big enough for a GRK screw, and then put in plugs? HMMM Maybe metal plugs that'll look sexy.
Thanks for all the replies.
I'm thinking that some minimal 1/8" to 1/4" pads that float the 5x4ft off the wall just a touch, and provide a wider compression from drywall to to stud. Now do I simply make holes big enough for a GRK screw, and then put in plugs? HMMM Maybe metal plugs that'll look sexy.
Thanks for all the replies.