Leviton recommends using mud rings rather than receptacle boxes to terminate your low-voltage cable. Aside from acting as mounting hardware for a device and wallplate, a mud ring allows complete access to the stud or joist space for storage of the service loop which in turn means less danger of damaging the cable. Mud rings are available at electrical distributors, home centers, and wherever drywall supplies are sold.
In some localities, the code mandates electrical boxesand conduit for low-voltage wiring. Always check your local regulations before installing low-voltage cable.
If electrical boxes are required, use the deepest 4-square boxes available to allow for cable bend radius and service loop.