AUDIO SOURCE VSL125IM Impedance Matching Volume Control 125 watts continuous power handling12 position, 39dB of attenuation, eight speaker compatibleSelectable impedance matching 1x, 2x, 4x, or 8x settings, 1x setting for single zoneRemovable speaker inputs (accept up to 14 AWG)Includes 3 colors with interchangeable plates and slider controlsImpedance matching