Rens Heijnis custom-built audio equipment - Although the DPA/B&K 4003, 4004 and 4012 have a transformer less output and a 130V power supply, for these microphones are also good improvements possible. The
DPA 4003 Omnidirectional 130v (Used) - Vintage King
Norwegian Pianist Chooses DPA for CD Trio | LIVE-PRODUCTION.TV
DPA d:dicate™ 4003 OMNIDIRECTIONAL MICROPHONE, 130 V - TAI Audio