What is it?A 6-channel phantom power supply designed for rack mounting. DetailsThe RPB623 is said to deliver “ultra clean” 48V phantom power to up to six condenser microphones. Each input is via a female balanced XLR connector (with pin 2 hot) and each output terminated with a 1/4” TRS balanced jack. To eliminate the possibility of any DC voltages causing damage to equipment, the design incorporates pull-down resistors and isolation capacitors on all outputs. When connected, the output impedance of each of the channels will be the same impedance of the microphone. Powered from an external AC supply, the RPB623 features green LEDs on each channel that light when that channel is in use; all LEDs light momentarily when the unit is powered up.