VTG Ground Lift Barrel XLR male-to-female Barrel coupler Lifts Pin 1 on XLR cable to remove hum This is a wired XLR male-to-female, barrel-styled coupler that helps you eliminate excess hum by lifting Pin 1 on your XLR cable This is a wired XLR male-to-female, barrel-styled coupler that helps you eliminate excess hum by lifting Pin 1 on your XLR cable