SUT vs. Phono preamp

I own an EAR 324 phono pre-amp which has transformer settings of 4, 15 and 40 ohms and 3 gain settings.  I struggled for a year to achieve the correct sound for my Benz Ruby 3.  It was either too bright and thin or too dull and heavy sounding. 

My cable manufacturer friend told me to just use a resistor at 220 ohm on an Audio Interface L40.  That is the perfect setting for the cartridge.  The Zesto has four settings within 10 ohms of 220 ohms including 220.  It has the widest range using nearly identical Jensen transformers.  I have not heard anyone claiming the Zesto SUT isn't superb.  

Does anyone know that the Zesto is inferior to the Ortofon or Denon or my Audio Interface?  

Dear @fleschler  : I know is inferior to the AU-1000 and probably your Audio Interface is even better at least yours has wider frequency response and this says a lot:

https://audiokarma.org/forums/index.php?threads/audio-interface-cst80h-step-up.866712/

I don't know why you could go for the Zesto when your Audio Interface is one of the best out there and I don't " see " how the Zesto can beats it, but........

Btw, I think that is improbable that a Zesto owner already tested against the SUT's you ask for.

Anyway, always great fun testing audio items.

R.

The ISO-MAX Jensen SUT should be nearly identical to the Audio Interface (and is easier to use with the front and rear separation for input and output).  It is very reasonably priced if it is the same transformers.

If you are on a budget I would go with an SUT, if you plan to use a low output cartridge. If budget is no concern, I would go with a good phono section capable of low output cartridge operation.


There is more than just noise to be concerned about. SUTs must be properly loaded so as to not ring (distort); this loading depends quite a lot on the cartridge used; IOW varies depending on the cartridge.

An active phono section will probably have more noise. It might also have more bandwidth; personally I prefer the improved soundstage and detail I get from going direct. But it doesn't always work that way so in a very general way, that is why I made my initial recommendation.

Yes, Benz cartridges are not known to be SUT happy and prefer phono stages that can increase output without transformers.   However, in my case, the Audio Interface is an ideal match for an SUT.   My cable maufacturing friend built a low noise, subminiature tube step up but we couldn't get the impedance just right through changing of resistors.  It still had substantially more noise than I wanted to live with.