This professional headphone amplifier allows the connection of a signal source both left and right via RCA connections (CD player or mixer) or connection with a 3.5 mm stereo plug (computer sound card, mixer headphone output). All outputs are designed for stereo signals via 1/4" TRS. Each output has its own amplifier control resulting in ultra-low noise operation, and each output also has its own volume control. There is enough signal gain to use this amplifier with almost any headphone. A stereo/mono switch allows the user to listen in stereo or mono. Ideal choice for studios, broadcasting, schools, or simply for listening to music at home.