Ken, although I have a fair bit of catching up to do before I hit 60 (grin), I do know something about these cartridges so please allow me to respond.
Matsudaira is the original designer, My Sonic Labs is his brand, and Eminent is his sub-brand for cartridges. Matsudaira is responsible for a number of OEM designs based on the Eminents, and the AirTight PC-1 Supreme is one such OEM. For years, Matsudaira's particular area of interest has been the reduction of coil impedance while keeping the output voltage usable. Therefore, Matsudaira has been leapfrogging between his own brand and his OEMs, pushing the coil impedance ever lower. Because of this, the Eminent lineup doesn't have any direct correspondent to the PC-1 Supreme (1 ohms 0.4mV).
Here's the Kubotek Haniwa HCTR01, another Eminent OEM which extracts 0.35mV from 0.8 ohm coils (link in Japanese):
http://www.kubotek.com/haniwa/cartridge.html
You can see the Eminent lineup here (link in Japanese):
http://joshinweb.jp/audio/5727.html
Matsudaira's present top model is the Ultra Eminent BC, and in it he's managed to drop the coil impedance to 0.6ohms while maintaining an output voltage of 0.3mV (probably measured at 3.54cm, so if measured at 5cm/sec it would give 0.42mV).
You can see it here (link in Japanese):
http://joshinweb.jp/audio/5727/4535540143437.html
FWIW, my listening impression of the Eminents and AirTight is the opposite of Prcinka's.
hope this was of interest.
Matsudaira is the original designer, My Sonic Labs is his brand, and Eminent is his sub-brand for cartridges. Matsudaira is responsible for a number of OEM designs based on the Eminents, and the AirTight PC-1 Supreme is one such OEM. For years, Matsudaira's particular area of interest has been the reduction of coil impedance while keeping the output voltage usable. Therefore, Matsudaira has been leapfrogging between his own brand and his OEMs, pushing the coil impedance ever lower. Because of this, the Eminent lineup doesn't have any direct correspondent to the PC-1 Supreme (1 ohms 0.4mV).
Here's the Kubotek Haniwa HCTR01, another Eminent OEM which extracts 0.35mV from 0.8 ohm coils (link in Japanese):
http://www.kubotek.com/haniwa/cartridge.html
You can see the Eminent lineup here (link in Japanese):
http://joshinweb.jp/audio/5727.html
Matsudaira's present top model is the Ultra Eminent BC, and in it he's managed to drop the coil impedance to 0.6ohms while maintaining an output voltage of 0.3mV (probably measured at 3.54cm, so if measured at 5cm/sec it would give 0.42mV).
You can see it here (link in Japanese):
http://joshinweb.jp/audio/5727/4535540143437.html
FWIW, my listening impression of the Eminents and AirTight is the opposite of Prcinka's.
hope this was of interest.