Passive filter direct injection box this di box is ideal for connecting your musical instrument to a mixing desk converting a high impedance signal to a low impedance signal it also provides a ground lift switch for hum free performance and an attenuator for compatability with any mixing console unbalanced high impedance input via 6 35mm jack parallel output 6 35mm socket allows transfer of instrument signal direct to another amplifier etc xlrm balanced lo z output black anodised aluminium