If you want to drive several pairs of speakers with one amplifier The Buffalo Electronics VC-5S-LA 50W Volume Control with Selectable Impedance Protection is the volume control for you. The VC-5S automatically protects your amplifier from overload. Other volume controls have the option to jumper out the impedance protection when it is not needed, the VC-5S works equally well in either mode but has the added responsibility of paying attention to the controlling jumpers, making the VC-5S the easiest to use, most foolproof impedance protection volume control on the market today. If you want to drive a single listening zone with its own amplifier this is the volume control for you. Without the protective circuit the volume level increases allowing a lower power, less expensive amplifier to be used. The Volume Control is also available in Ivory and White.