Russound Autoformer Volume Controls Overview Volume controls offer wonderful convenience and control to enhance your lifestyle. They are easy to use and blend into almost any decor, inside or out. Russound wrote the book on volume controls and is widely regarded as the industry leader. Today we offer several high quality models in a variety of colors to suit almost any application. All Russound volume controls utilize a high quality autoformer design which provides high performance, reliability and long life. Our volume controls are designed to provide superior sound quality, ease of use and flexibility no matter the need. In fact, we are so confident of the quality of our volume controls, that each one comes with a limited lifetime warranty! (See warranty for details). All ALTx volume controls are stereo, 126Watt/Ch. (max) controls featuring a 12 position switch (including "off") and detachable 12 gauge connectors. They can operate either as a standard (1X) or impedance matching (2X, 4X, 8X) control.