Check the listing for details. Audtek VC-50S Impedance Matching Sliding Speaker Volume Control 50W. Condition: New. Listed at 26.93 USD. The Audtek VC-50S Impedance Matching Sliding 50W Volume Control gives you 12 indented attenuation steps for use with any combination of 4, 8, or 16-ohm speakers. Impedance matching design allows you to use the control with any combination of 4, 8, or 16-ohm speakers. Easily adjust impedance by adjusting the position of two shorting bars. High-quality components ensure no signal quality loss while attenuating. A broad frequency response retains a tight low-end response and crisp highs. Phoenix-type connectors accept up to 14 AWG to simplify the installation process. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ • Type: Sliding impedance matching _x000D_ • Power handling: 2 x 50W _x000D_ • Speaker impedance: 4, 8, 16 ohms _x000D_ • Attenuation steps: 12 (step 1 is no signal, steps 2-7 at 3 dB each, step 8-11 at 6 dB each, step 12 is full signal) _x000D_ • Frequency response: 35-20,000 Hz _x000D_ • Input / output connections: Phoenix-type, up to 14-gauge speaker cable _x000D_ • Size: Standard single gang _x000D_ • Dimensions: 4" x 1-3/4" x 3" _x000D_ _x000D_