Attach a bolt to drywall
I am trying to attach my sorround speakers to my drywall, it has a bolt hole which probably takes a M8. I am trying to attach the bolt to the drywall thru some kind of U channel or plate with a groove so the Bolt slides in and the head is flush with the wall. I can use a piece of wood, drill hole for the bolt and slightly larger countersink for the head and then screw the piece of wood to the wall. I am looking for any suggestions for doing this better.
As always appreciate all the feedback