Increasing a Low output MM

Consider a step-up-transformer. Come in various flavors, some even adjustable (Zesto). I have the latter, and gives fuller sound, though introduces a bit of transformer hum. So I have to chose between tube hiss from EAT eglow petite PS, or transformer hum from SUT. Cart is Aphelion 2 (also have a SS Zephyr, but have not mounted that on the new naia yet).

Overon. No. Don’t consider a SUT. 

Sorry. "Oberon", not "Overon". Like the character in Midsummer Night's Dream.

There are several reasons why it would not be a good idea to introduce a SUT in the OP’s system. First, most commercial SUTs offer about a 10X voltage gain. If you increase the voltage output of the OP’s cartridge by 10X, it would be ~25mV fed to the MM phono inputs. That would be more than enough to overload the circuit at least on anything approaching a transient. Second, the SoundSmith cartridge is an MI type, not an MC type for which SUTs are most suitable. MI cartridges, especially high output ones, have about 1000X higher inductance than a typical MC and thus do not do well with the net input impedance you would get if you interpose a SUT.

Mind you, the proof of the pudding is in the eating, no? I have two low output MIs (0.4mv and 1mV), and prefer them both through a SUT rather than the MC input of my phono stage.

Hello, doggy, but this is an MI with an output of 2.4mV.  Which has commensurately higher induction than either of your cartridges are likely to have, since for an MI, votage output is proportional to inductive property, and again, the total gain into the MM phono stage would almost certainly be overload the input.  Those were my points. Sheesh!

Go and eat that pudding, if you like.