Whirlwind MultiDirector 4-channel Passive Instrument Direct Box Whirlwind 4-Channel 1 RU Multidirector Box - Whirlwind 5 Year Warranty Frequency Response: 20 to 20k Hz. +/- 1dB Input Impedance: 20 kOhms Output Impedance: 150 Ohms Signal Loss (I/O): - 20 dB, (- 40dB pad in)