Radial Engineering Radial Engineering SB-48UB Phantom Power Supply for Instrument Microphones Circuit type: Non-radiating phantom power supplyNumber of channels: 2XLR connectors: AES standard pin-1 Ground, pin-2 (+), pin-3 (-)Phantom output: Switchable +48 / +12 volts DCPower supply: 15VDC / 400mA external supply included The challenge when using a condenser microphone with a preamp pedal or stage amp is that most of these only have unbalanced inputs As most phantom power supplies are only equipped with balanced inputs and outputs, making a proper connection is often difficult or impossible due to the impedance and level mismatch The SB-48UB is a single-channel phantom power generator that converts the power from a 15VDC supply to 48 volts for use with a condenser microphone The SB-48UB converts the signal to both a Lo-Z balanced XLR output and a Hi-Z unbalanced 1/4" output