TRS differentially balanced ins and outs(234)

XLR  differentially balanced ins and outs(234)

Mode switch for stereo mono 4-way or 2 way/3way operation

x10 range switch on both channels

40hz high pass (low cut) filter both channels

Phase reverse switch on all outputs

Individual level controls on all outputs

24db per octave linkwitz-riley filters (the professional standard)