Allnic H-1201 Cartridge loading?


Hello all!
i am considering upgrading my phono pre to an Allnic H-1201.  However, I am concerned by the lack of loading with this unit.  Am I missing something?  If you select MC input, what is the loading?  Also, how about MM?  Do I understand correctly there is no loading capabilities with the H-1201?  Is that possible, a $3k phono preamp with no loading?
Thanks for any and all comments.
Louis

louisl
Louis, You’ve got the right idea, for MC, but the wrong correspondence between db of gain and resistance. The values are stated in reverse order in the review, gain vs resistance. I think it would be as follows:
62 db gain = 278 Ohms = 13X gain
66 db gain = 117 Ohms = 20X
68 db gain = 69 Ohms = 26X
72 db gain = 29 Ohms = 40X
In other words, as gain goes up, resistance goes down, because you are using transformers with increasingly higher turns ratios to get more gain.

For MM, I would guess the MM inputs bypass all of the 4 permalloy SUTs and end up with the 40db total gain that is inherent to the RIAA section (adequate for most MMs, perhaps a little low for some MI types). Also, since the impedance seen is equal to the value of the static load resistor divided by the square of the turns ratio, for MC, we can extrapolate back using any of the above set of data points to get the value of the load resistor seen by the MM cartridge (and also at the secondaries of each of the 4 SUTs), which would be 47K ohms, as predicted and as is typical.
(For 40X gain, that means the turns ratio is 1:40. The square of 40 is 1600. 47K divided by 1600 is 29 ohms, as shown above.)
Hello: just picked up a used 1201.  Fantastic improvement over my little IFi amp...
question to other 1201 owners:  on mine, the light over the mute button is a bit brighter than the light over the power button... is that normal ?
lovely sounding amp !
Yes. I like to listen in the dark and those little lights are bright? One piece of electrical tape wasn’t enough. Needed to double up and even then, I could still see the mute button through the doubled up tape. 

Enjoy the Allnic. Since you bought used, she should be nicely burned in.