Contrary to passive DI boxes, the active Ultra-DI DI100 sets no limits regarding varying or mismatched impedance. How The signal is buffered by a high-quality amplifier. What does this mean to you? You get a clean, pure, powerful signal, which is immune to interference and therefore free of noise and hum - even with extremely long cables. The renowned Behringer OT-1 transformer ensures absolutely linear frequency response and ultra-low distortion, especially in the low end. The audio specifications speak for themselves: linear frequency response from 10 Hz to 50 kHz, S/N ratio of -102 dBu, and THD <0.005% at 1 kHz.