6-Channel Matrix Headphone Amplifier From The Manufacturer: The HP6E professional headphone amplifier features five stereo input channels, six stereo output channels and an ultra-flexible matrix design. In addition to the master channel, you can assign each output to one of four selectable input channels, providing the versatility you need for all kinds of monitoring and recording sessions. Features: Streamlined Footprint Carefully Selected Components Two Stereo Inputs Two Outputs Per Channel Specification: Design 6-Channel headphone amplifier Input 6.3 mm (1/4”) socket - unbalanced Input impedance 100k Ohms Output 6.3 mm (1/4”) socket per channel Output impedance 11 Ohms Audio frequency bandwidth 20 - 20000 Hz Max. output level 300 mW Distortion < 0.05% Signal to Noise better than 85 dB-A Net weight (incl. power supply) 760 g