The UM 900 is the first switchable pattern, valve condenser microphone which can be connected to industry standard 48 volt phantom powering using a normal 3-pin XLR microphone cable.
Well I am at Armando's studio Cosmos in Mexico and about to try his best 48, 67, vintage 87, 251 and Gefell UM900. I will report back. This should answer a lot of questions. p.s. This experience of being out here is beyond words.
Doesn't sound like the mic is working out for you. I think you should get the Josephson and compare them and then sell me the UM900. In all seriousness, sorry to hear about your operation not going well.
Nobody has reviewed this product yet. Have an opinion?