Prewire - New Construction
Crutchfield Customer Review (What's this?)
New Construction - made prewire a breeze for in-wall speaker mount. Instructions are printed on the box, not included as a separate document. Note that it's not real clear which direction goes inside the wall and which side is mounted in the sheetrock. The correct way to mount these is "rough-side" out. Also note that the tab inside the hole is for securing your wiring until drywall gets installed then it is "breakaway." These are worth the investment if you are doing new construction. There are tabs on the back of the speaker that turn and hold the speaker in place behind the wall once installed.
Pros: Simple install low cost no confusion on where speaker mounts need to be for contractors
Cons: instructions are not clear