What I meant by "boxing" is I would have to cut out one of the studs. Normally when you do this you have to install more 2x4's next to the adjacent studs and build a box like you would be framing a window. Since its a non bearing wall maybe I could just cut just cut out the stud where the speaker would go and brace the lower remaining part of the stud with a horizontal 2x4 brace so it is held in place.
The W100 is an in-wall speaker anyway so I don't think the boxing rule necessarily applies to this anyway.
