ensure proper grounding. This NEUTRIK part, NC4FBV, is a 4-pole female XLR receptacle that is designed for vertical PCB mounting. It features a separate ground contact to the mating connector shell and front panel, ensuring reliable and secure grounding. The B series offers the same high-quality performance as the A series, with the added benefit of a metal mounting flange. This flange provides continuous circumferential ground contact, further enhancing the grounding capabilities of the receptacle. With its robust construction and excellent grounding features, the NC4FBV is an ideal choice for professional audio applications.