- 2 x switching (normalling) stereo jack without switching contact, horizontal PCB mount, https://www.neutrik.com/en/product/nc4fbh B Series, 3 pole male XLR receptacle, grounding: mating connector shell to pin1 and front panel, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc5mbv-b B Series, 3 pole male XLR receptacle, switching contacts, grounding: separate ground contact to mating connector shell and front panel.