Check the listing for details. OSD 100W In-Wall Slider Volume Control w/ Impedance Matching, Black/Brown VMS100. Condition: New. Listed at 37.54 USD. OSD Audio’s VMS100 is an impedance-matching volume control for adjusting the volume of a pair of speakers within a whole house audio system. Ideal for dining rooms, saunas, porches or other areas of the house where you want to add sound, the VMS100 maintains the full hi-fi audio frequency response with no low frequency roll-off and is equipped with the same features of volume controls that cost twice as much. Rated at 100 Watts peak, the volume control includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously, and the impedance-matching feature helps stabilize the ohm load going back to the amp or receiver to avoid overheating. This is a complete volume control kit that fits into a standard single-gang box and includes the VC, junction box, screws and assorted color trim plates (white, ivory and almond) so you can choose the color that best matches the room. Compatible with almost any dedicated audio zone or whole house system, the electronics inside the VSM100 are designed with a ruler-flat frequency response while the 12-step slider provides noise-free volume control and a wide range of listening volumes.Features:Decora style impedance-matching volume control for whole house audio systems and dedicated audio zonesRated at 100 Watts peak with minimal bass roll-offImpedance-matching helps stabilize the ohm load to avoid overheatingAccepts up to 14-gauge wiring and fits in a standard gang box with a depth of 2.9”Includes junction box, screws and white, ivory and almond trim plates to match any room décorPrecision electronic design provides low distortion and a ruler flat frequency response12-step linear slider for pop-free control and a wide range of listening volumesInstalls easily and works with almost any audio systemSpecifications: Volume Control Type: 100W Impedance Matching Slider StylePower Handling: 100W Peak; 50W RMS Per ChannelFrequency Response: 20Hz - 20kHzTotal Attenuation: 52 dB (Max)Steps: 12 (Make Before Break)Impedance Matching for 1/2, 4, 6, or 8 Pairs of Speakers*Can be Used as Non-Impedance Matching if Leaving Default on Jumper Setting at 1XWiring Requirement: Up to 14 Gauge WireRemovable Input and Output "Quick Connect" Phoenix ConnectorsFits in a Standard Single Gang Box - See LV1 for Mounting BracketUnit Dimensions: (L x H x D) 1.62" x 2.5" x 2.5"What's Included: Plates, Inserts, Screws, and SliderWarranty: 5 Years