Low-Profile XLR 1/4' Combo Jacks Amphenol Audio Low-Profile XLR 1/4' Combo Jacks feature a space-saving design that offers a 15% mounting pitch reduction and a lower height than traditional C-type combo connectors. These jacks combine two connectors into a single connector housing with a positive latch lock system (XLR). Amphenol Audio Low-Profile XLR 1/4' Combo Jacks are available in 3, 6, 9, or 10 pole versions with vertical or horizontal PCB mounting configurations.