Interesting system.. I use CJ Premier units in two systems - a 15 phono in a heritage system and a 14 and 11a in my main system.
With the 15 I run a Lyra Clavis low output cartridge. The 15 has lower gain than the Vendetta I use in the main system, but it still has enough gain for a low output (0.25 mv), particularly as that is my acoustic music system with inefficient (Martin Logan CLS) speakers.
I see no reason why you can't run a medium or even a low if the output cartridge. The solid state phone stage you use has higher gain than my tube one does.
With the 15 I run a Lyra Clavis low output cartridge. The 15 has lower gain than the Vendetta I use in the main system, but it still has enough gain for a low output (0.25 mv), particularly as that is my acoustic music system with inefficient (Martin Logan CLS) speakers.
I see no reason why you can't run a medium or even a low if the output cartridge. The solid state phone stage you use has higher gain than my tube one does.