Audiowerkzeug BOOSTi², Headphone Amplifier, Powerful headphone amplifier for studio and stage applications, 2 Parallel headphone outputs, Signal and clip LEDs, Compact, robust aluminium housing, Inputs: 2x XLR / TRS combo balanced, impedance 10 kOhm, Outputs: 2x 6.3 mm stereo jack unbalanced, 2200 mW at 50