4 Channels Passive DI-Box Unit Hum Eliminator 1/4'' instrument Direct Box to XLR Professional Impedance Transform Audio Isolator DI Direct Box for Touring and Live Performances Channel: 4 channels Input: 6.35mm TRS Output: 6.35mm TRS, XLR Input Sensitivity (ref output level=0.775V/600ohm.1mw) ATT-40dB Input level: INPUT LEVEL(100mW)--70.7V ATT -20B Input level: INPUT LEVEL(10mW)--22.4V ATT -0dB Input level: INPUT LEVEL(1mW)--7.1V Total Harmonic Distortion: 20Hz~20KHz--0.03% Frequency Response: +0dB/-1dB--20Hz~20KHz Input Impedance: ATT-0dB---50Kohm (MATCHING-Z) ATT-20dB---50Kohm (NORMINAL-Z) ATT-40dB---100Kohm (NORMINAL-Z) Output Impedance: 600ohm(MATCHING-Z) Product Size: 11.5 * 13.6 * 5.8 cm/4.5 * 5.4 * 2.3 inch Product Weight: 361 g/12.7 oz