Har-Ken HK-106F BNC Female to XLR Female Adapter
The HK-106 adapter allows you to use any coax cable as an audio pair without the fear of having the body of the XLR grounded to the shield of the coax cable. The unique design of the BNC connector keeps the coax shield and the XLR body completely isolated. The HK-106 could prove invaluable in most temporary audio installations.