Volume Controls and Wiring
Get rooms ready for music. Devices to control the volume in each room are what make the system accessible and usable. Every room should have a means of adjusting the volume independently of the other rooms in the home. Because each volume control requires its own wiring, this is an important item to review during the wiring phase of installation.
If you are working with an audio installer, don't worry about the details, but try to keep your future needs in mind. It's not a bad idea to route wire to more locations than you are going to use immediately, keeping your options open for the future. If you do this, make sure that your installer leaves you with a clear wiring diagram so he or you will know where to drill holes in the future.