The 406 addresses the requirements for professional headphone mixing. It`s a great processor for professional, project and home studio applications. The processor has an output and level control for each set of headphones, and a stereo input for connecting the program source. Designed and engineered to be durable and rugged, the 406 is an ideal choice when the need for quality audio processing is of paramount concern. The unit is designed for mounting in a standard 19" equipment rack. Features six headphone channels with individual volume control and headphone out jacks; Insert jack for each channel to isolate it for specific input signals; Single 1/4" stereo input (front); Dual Left / Right 1/4" inputs (rear); Left / Right auxiliary 1/4" inputs (rear); Pan control (front) also regulates Left / Right relative input levels in mono mode; Mono/stereo switchable; Power LED; 1U rack-mounting.