I had the Prem 15 many years ago. It's a real nice unit. I ran a Koetsu RSP with .2mv, and it was not enough gain. I can't remember if it has an MM/MC inputs or MC only, but I think just MC. I would think a .5 or .6 mv cart would be pretty ideal. Something like a Shelter, or maybe one of the Ortofon's with a slightly higher output. An SUT would only make sense in to an MM input, but again, I didn't recall the 15 having one.
MC suggestions for conrad-johnson Premier 15
I am looking for a new MC cartridge that will work with the premier 15. I am running a Clearaudio Maestro V2 (mm) currently and it has too much output for me. It doesn't over drive anything but at the lowest setting on my pre-amp it is too loud for late night listening. The total output is close to 2V (calculated). I am running an SME 309 arm and was considering the Ortofon Cadenza Bronze. Any help is welcomed, but advice from Premier 15 owners would be awesome.