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
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
There is a WWII era military RCA, I think that a lot of folks like and it isn’t crazy money. I’ll see if I can find it for you and post here. I have used old Mullard fat base 1st series, which was OK, not as good as metal base Mullard which is now very expensive too. I do think that Dubstep Girl write up is pretty informative, not that i’d go throw hundreds of dollars at an unknown tube, but at least you have an interesting list of things to consider. More later....

OK, it is a WW2 Double Bottom getter RCA JAN CRC 5R4GY. If you look up Allnic, rectifiers and Rockitman (who does post here occasionally), he thinks these are the next best alternative to the WE, which are tres expensive. The RCA is not stupid money and is probably worth a try. I gather that the WWII era ones are better than the later ones, but take a look at some of the anecdotals. It may also be covered in the Dubstep list too. 
good luck and good listening- enjoy your phono stage!