Leviton's Decora (R) Strauss Transformer-Free and Transformer- Free Impedance Matching Volume Controls combined with premium installed speakers can be used to design a no compromise installed multi-room entertainment system that delivers the best reproduction possible from today's ultra-wide bandwidth digital sources. In multi-room distributed audio systems the source of undesirable speaker coloration (usually perceived as a muffled-inch sound) is often the volume control itself because the audio transformers (AKA: auto formers) used in conventional controls can actually filter the bass and treble frequencies. The Decora Strauss Transformer-Free Volume Controls use audio-grade Cermetile resistors to change volume levels while leaving the audio signal unaffected resulting in ruler-flat frequency response across the entire audible frequency range. Moreover the Decora Strauss Transformer-Free Volume Controls eliminate the problem of saturation-inch associated with conventional volume controls with their ability to instantaneously handle the full peak output power of any consumer-grade amplifier on the market today. The award-winning Decora Strauss Transformer-Free Matching Controls are available in two versions: regular and Impedance-Matching. Decora is a registered trademark of Leviton Mfg. Co. Inc. Decora slide control with precision 12-positon switch(including full OFF position) Transformer-Free attenuation technology ensures linear frequency response signal integrity and high power handling ability Cermetile resistors replace conventional auto formers to preserve audio signal purity