MM or MC cartridge for Mm input on Preamp

If you own a v2.0 Steelhead, which hasn’t changed in at least a decade, you should have its remote volume control, which of course is only relevant if you use the Steelhead as a full function preamplifier. Since you use it as a phono stage, the Manley remote is irrelevant of course. Any way you probably need the extra gain afforded by your linestage, if you’re using such a low output cartridge, which you haven’t identified so far.

i can not find the gain in my integrated amp manual which is Line magnetic LM845 premimum. The cart is Sumiko Palo Santos 0.5mv.

0.5 mV is no problem for the Steelhead even if your linestage adds zero gain to the phono signal. You previously suggested your cartridge puts out .01 mV, which I took to be a typo since there are no cartridges I know about that have such a tiny output.