Thanks for this Dave. But like JR, I'm not sure these measurements are with a MM source.
What it does remind me is how good 5534/2 is for MM preamps.
Have you a scan of the topology that Self uses for his virtual input Z?
Here's a 3rd 8ve noise plot of my MC headamp, the quietest in the known universe.
The B&K 2307 chart recorder has slipped by 1 tooth so 50Hz (hum) appears at 40Hz. 1dB/division
The MM is an Ortofon VMS20E. The Ortofon MC, either MC20-2 or MC10. The MC preamp is set for very high gain 28.8dB so if adjusted for equal loudness from the 2 cartridges, the noise advantage of my little circuit is even better. With RIAA, MM noise is whitish while MC is redder than pink.
At the time, every other MC step up device was at least 6 - 10 dB worse (usually much worse) depending on how you measured the noise. So you normally don't see this cos the noise of the step up device.
If you can match a MC properly, you'll get better S/N than MM. MCs have quite high power output even if voltage is low. MM is inherently inefficient in comparison. Also the inductance doesn't let you get close to true efficiency except for 1 frequency.
Does ultra low noise on vinyl playback matter? I think so. From analysing my listening test results and ignoring any obvious Golden Pinnae raving, there is a sense of less grittiness and also the system seems to disassociate clicks, pops & record noise from the music. Maybe a noise modulation effect. But I'm probably pontificating from the wrong orifice and it was 30 yrs ago.
The loading capacitor also affects the noise, improving it for the usual MMs.