This Neumann AC 29 Adapter Y-Cable is a Y-cable with a XLR 5-pin connector and two unbalanced 1/4"/6.3mm mono plugs, with blocking condensers. It is used to connect the XLR 5-pin output of the MTX 191 (MTX 191 A see AC 27) matrix amplifier and KU 100 microphone to units with 1/4" monojack inputs.