Have you tried it without loading? I have a JLTi which I run without loading plugs. It runs a Zyx 4D LOMC very nicely at 47K .It also ran a Benz Ebony L without loading. If your preamp is stable enough it may run without the loading. But you won't know til you try it.
Need RCA loading plugs
I have an Einstein Phono pre amp that uses RCA plugs to provide different loading options for MC cartridges. I need some help finding someone who can make 4 sets of plugs with different ohm loads. I understand it is not difficult but I have no experience. Thank you in advance for your help. Steve Gunther