In wall Speaker mounting brackets.
Crutchfield Customer Review (What's this?)
It just so happens I finished installing this product yesterday. I had to wait for the Foam Insulation to go in first. I ran the wire first, then lined up the Brackets where I wanted them and made sure they were level. I then installed two 2x4 studs, top and bottom to reinforce the Brackets on both speaker locations. This I find was a critical up grade to hold the Brackets very strongly and rigid. It did not take long and worked out to perfection. It was not in the instructions but having experience in building was a no brainer for me. Before I even bought the Brackets I new ahead of time that this was crucial. This method can be done in a preexisting wall but would certainly be a little more difficult. BUT, it can be done if your looking for a great base for your Speakers.
Pros: It's an awesome tool for in wall Speaker installation. You just need to know ahead of time what's involved with the install and plan ahead.
Cons: For the people that are not hands on or handy I can see this being a little daunting. I suggest that the Manufacture Co. update ther instruction sheet to help people know what to expect.