MC Phono preamp gains

"Ihcho
So, virtually any combination is possible for all three inputs? Like, having all three as MMs, all three as MCs with different gains and loads, and mix of MMs and MCs?"

You are correct and it is very flexible

Or just buy anothen MM phono stage which is no expensive normally, why do you want them all in one cabinet ?

Well, which would be better. One phono preamp with three inputs or three separate phono preamps, if the price is the same.
If you go for three preamps, would you go for the same model for all three or different ones?
How about additional cables? How about space?
If Rhea costs $4000, would a phono preamp at 1/3 of Rhea be as good as Rhea?
Well, for me, it seems to be more complicated and less attractive if I go for three phono preamps. If I have three different phono preamps, I may end up using only one that I would like most, and then I need to change cables each time I try different turntables.
There are two used Rheas for sale now ($2400 and $2900), and they are out of my reach, but I will seriously consider it for my next phono preamp.

Many thanks for all replies.

If and when you consider the Rhea, a point to keep in mind is that its highish and frequency-dependent output impedance would be non-optimal if the input impedance of your line-stage is less than around 30K balanced and perhaps 20K or so unbalanced. See the second paragraph here. Also, if unbalanced interconnections to the line stage are used, and if the length of those cables is particularly long (e.g. 15 or 20 feet or so), it would be best to choose cables having low capacitance per unit length (e.g., less than say 25 pf/foot).

Regards,
-- Al

Ihcho, if you're looking for MM premps (and you need 3 of them or one with 3 imput) why no try 3 different things with your cartridges and keep the best. So many MM preamps available, if you will search audiogon for preamp thread you will see at least 5 decent options to buy and they are not expensive.