OSD In Wall 100W Slider Volume Control, Speaker Impedance Matching White, Black, Brown Decora Style

Features:

• Decora style impedance-matching volume control for whole house audio systems and dedicated audio zones
• Rated at 100 Watts peak with minimal bass roll-off
• Impedance-matching helps stabilize the ohm load to avoid overheating
• Accepts up to 14-gauge wiring and fits in a standard gang box with a depth of 2.9”
• Includes screws and white, ivory and almond trim plates to match any room décor
• Precision electronic design provides low distortion and a ruler flat frequency response
• 12-step linear slider for pop-free control and a wide range of listening volumes
• Installs easily and works with almost any audio system

What Is Impedance Matching Volume Control?

Impedance is a measurement of resistance to alternating current. Speakers are specified by impedance, and a common value is 8 ohms. When you’re connecting multiple speakers to a receiver or amplifier, you need to stay above the amp’s minimum load requirements because going below the impedance rating can overheat or even damage expensive equipment. Volume controls such as the VMS100 have selectable impedance so you can match the impedance with the number of speakers being controlled with the capabilities of your amp. A basic multi-room system will typically have an amplifier/receiver, a speaker selector, four to eight pairs of speakers, and volume controls. Impedance-matching volume controls feature three settings depending on how many speakers you are connecting. For one to two pairs of 8-ohm speakers, the setting is 1/2x; for three or four pairs of 8 ohm speakers, the setting is 4X. Volume controls do not add gain (volume) to your speakers but simply attenuate the volume up or down. During setup, you'll set the source volume to its optimum level, then the volume control turns the sound down to inaudible levels.