How low of the cartridge output the Allnic H3000 can handle?


Hi everyone,
I am using the Allnic with the Zyx carts right now, and it sounds wonderfully. Now I am thinking of trying the other cartridge whenever my budget allows. I am thinking of low output Koestu, ... I do not undertand clearly about the impedance matching of the cartridge and the SUT inside the Allnic. 
If we can put the technical thing aside, could someone with experiences with the Allnic 3000, please let me know of which carts you have used successfully with the Allnic please?
Thanks,
Calvin
dangcaonguyen
Yep, @wrm57  have done the same things- I think we both had Steelheads, no? Nice to see you, wrm!
Indeed, we ran with the Steelheads for a few years. Then you helped hook me onto the Allnic maybe 4 years ago. A whole 'nother fish and one that I've never wanted to throw back. So thanks again! Always good to read your helpful posts.
Never mind, 
After reading the link @whart provided, it is worth to try.
I will order it in the next few months and then report back the results.
 Thanks 
Calvin