thread: SSL Origin .
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Old 11th December 2019
A schematic would be interesting as SSL has done some innovative stuff. Jfets for the mic preamp? The last time I saw that done was Craig Connolly's last Neotek release with 2SK170's fets used in place of the usual low noise bipolar 2SD737's.

It did raise the noise floor as those bipolar parts are .5 nv noise, the jfets are all 1 nv or more for the 40 volt parts. A very high input impedance is one benefit of the jfet frontend. Linear Systems 1 nv noise matched dual fets might be a great part to try.