Friday, March 23, 2018

Schaub Lorentz SM200 and Pleiades V6


They mate very well together. But there is a lot of proximity compensation since the mic is 750Ω and the input transformer currently used on the Pleiades V6 has a primary inductance of 140mH. So one has to sing at about 2in to 3in from the mic. This is good for a high signal to noise ratio.


In order to try it at a larger distance the input transformer was unplugged. And the internal transformer of the mic which transforms to an output impedance of 50KΩ was connected to the grid of the EF183 through the 22nF coupling capacitor.


There was phase reversal so the phase reversing adaptor on the Sony was removed. The sound was excellent.


Signal path, setup:


Male singing voice at 6in to 8in - Schlub Lorentz SM200 from it's Hi Z output - Pleiades V6 without input transformer - Sony TC-D5 Pro - Sennheiser HD580


Great body of sound, extended and detailed treble, nice midrange. There is something very nice about this mic and its transient response.


It is sensitive to handling and electromagnetic noise. The former should be because it is a directional moving coil so the diaphragm resonant frequency is placed low. One of the reasons for the latter may be the internal transformer.


Reference:


Pleiadss V6 schematic







No comments:

Post a Comment