Behringer ultra di professional active 2 channel di box splitter d120 behringer di120 the behringer di120 di box ultra di is a professional quality direct injection box that acts as an active 2 channel unit which can be also used as an audio splitter box the unit can convert one or two separate unbalanced 1 4in trs inputs into two balanced xlr outputs alternatively the b ultra di b can be used as a signal splitter a mode switch enables the di box to be used to provide either two separ