SVC100 Impedance Matching 100W In-Wall Rotary Knob Style Home Theater Speaker Volume Control Switchable Decora Plates - OSD Audio - (White, Ivory, Almond) WHOLE-HOUSE VOLUME CONTROL: A complete Decora style impedance-matching volume control kit for whole house audio systems and dedicated audio zones so you can control speaker volume independently within various areas of your home or office. DECORA STYLE DESIGN: Installs easily and works with almost any audio system, includes three decora style trim plates in white, ivory or almond to match your room dcor as well as a 12-point linear control knob to adjust volume from high to inaudible. INCLUDES ADJUSTABLE JUMPERS: Rated at 100 Watts peak with minimal bass roll-off, includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously depending on what type of load your amp can handle. IMPEDANCE MATCHING PROTECTION: Includes selectable impedance matching so parallel connections of multiple volume controls can be installed without damaging your receiver or amplifier. A COMPLETE VC KIT: Designed to provide low distortion and a ruler flat frequency response, accepts up to 14-gauge wiring and includes junction box and screws. please update our item