The Powertechnik Tubelife-257 is a 19" PSU supplying two RFT Neumann mics from Gefell, especially the types UM57, CMV562, CMV563 and M582, the models CMV551 and CMV561 after modification of anode voltage to 200V.
19" Twin PSU for two Neumann tube microphones with AC701 like M49, M50, KM53, KM54, KM56, KM253, KM254, M249, M250, KM256, M269, KM63, KM64, KM65, SM69 or also Shoeps M221b
