Morley Hum Eliminator, Hum Eliminator, 2-Channel Hum Eliminator, 6.3 mm Smart Jacks (jack) and XLR sockets, Eliminates AC hum and prevents hum loops, but leaves the grounding intact, Passive operation - no power supply required, Operating range: 20 to 70,000 Hz at +/- 0.5 dB, Less than 0.005% THD @ 1 kHz, Crosstalk better than -97 dB, Max. input impedance: 1 kOhm, Min. load impedance: 10 kOhm, Dimensions (L x W x H): 120 x 82 x 44 mm, Made in USA