Architects' and Engineers' Specifications for

The unit shall be the Crown PH-4B phantom power supply or equivalent. It shall supply 48V DC on pins 2 and 3 with respect to pin 1 of the mic input connector, according to DIN standard 45 596. It shall provide four channels for powering up to four condenser or electret condenser microphones. The PH-4B shall be powered from 120V AC. The PH-4BE4 shall be powered by 220V or 240V AC. The Crown PH-4B is specified.