On the IMP Splitters are male XLR jacks, one female XLR jack and one switch as outlined below. (Note: Sections in parenthesis refer only to the IMP Splitter 1X3 and all other sections refer to both. INPUT Female XLR input jack for connection of a low impedance balanced signal such as that of a microphone. DIRECT OUTPUT and ISOLATED OUTPUT (1 and 2) Male XLR jacks. The DIRECT OUTPUT is a straight through connection from the input jack and will pass phantom power. The ISOLATED outputs each provide a low impedance (150 Ohms) balanced output signal through a Whirlwind TRSP transformer and WILL NOT pass phantom power.