Gain yourself the ability to store all your music on one system that has the power to send it to any location imaginable. Bedrooms, bathrooms, kitchens, dining areas, pools, patios, garages, hallways, are great ideas for multiple speaker zone location.  Finally, the ability to enhance every inch of your home, with one comfortable level of volume.  Installing multiple speakers with both left and right channel inputs will help keep the balance of each room, making a double stereo effect. Intercoms are a more common item seen in homes day by day.  Give yourself the opportunity to speak to whom ever, where ever, when ever.  Eliminate yelling back and forth, running up and down stairs, and beating on doors and walls with an intercom simple solution.