Hi ,
Slightly off topic, however, I am excited.
I just tried to run my MC phono signal through the RME UFX II mic preamp, convolve the signal with inverse RIAA FIR filter in Acourate convolver and - not bad, not bad ;-)
Read a lot about correct loading of MC cartridges, and in the end, reason for low impedance seems to be to fight RFI induced distortion in the phono preamp. Might well be the RME mic preamp is so good that 3.4kOhm impedance are perfectly fine and lower impedance is not required...
Only issue I still have: How can I digitally increase the gain after inverse RIAA convolution? The signal is too quiet, and my Acourate convolver does not allow positive gain.