I wanted to provide some feedback in optimizing my Orpheus set up.
I have tried to further optimize the VTF so far. Recall, I have been running the Orpheus VTF at 1.92g. I suspected this could have been contributing to a slight leaness and brightness. I went up to 1.97 g based on the suggestions of Bc3. This improved things in all ways.
First, the leaness disappeared to a very large extent. The sound became much fuller and smoother without sacrificing detail or upper end extension. In fact, it is more detailed and extended. Most importantly, it has a lot deeper and tighter bass, it now has a very full, smooth and natural mid and treble and has more power and dynamics.
I think this is a lot more what a Tranny is supposed to sound like and I'm enjoying the system even more.
I'll try experimenting with the Boston Mat. I've been told that this tends to brightness. I suspect removing this will make the sound even more natural, romantic but yet detailed and neutral.
Lastly, I'll try some different settings with the VTA. I'm using ~1.3 degrees based on the method proposed by Nsgarch. Before optimizing the VTF, I thought reducing the SRA muddied the bass a bit although it did reduce, but not eliminate, the leaness and brightness. I think the VTF made a much larger difference.
I'm now enjoying a very transparent, detailed, open and clear sound but with very good natural timbre. I think this cartridge really bridges these objectives very well.
Andrew