This professional headphone amplifier allows for a signal source to be connected both left and right via RCA connections (CD player or mixer), or connect with a 3.5mm stereo jack (computer sound card, mixer headphone output). All outputs are designed for stereo signals via 1/4" TRS. Each output features its own buffer amplifier 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 enables the user to listen in stereo or mono. A perfect choice for studios, broadcast, schools or just listening to music at home.