Is a SUT needed?

Is an SUT needed? No but IMO (only) I find an SUT into a MM stage gives me superior results.Better dynamics more detail and a more natural presentation. I've tried many SUT's and have found the Kondo SFz step-up the best until recently.  I have recently tried tbe SA Labs SUT from Russia to now have outperformed my beloved Kondo unit, and at a less expensive alternative. 

handymann ~ I'm sure your analog system "sings" and yes tubes can make a world of difference but again it's my opinion (after trying to perfect my alalog rig for close to 40 years now) that a MM phono stage used with a step-up transformer will usually outperform a MC phono stage alone in most parameters. 

A SUT & MM stage are like a peanut butter & jelly sandwich you can't have one without the other.  

HAPPY LISTENING

(dealer disclaimer)

handymann it's not that a MC phono stage doesn't have enough gain to drive the output of the MC cartridge that's not what I'm talking about.It's that a MM phono section is usually easier to build and doesn't require an extra stage and then when you add the SUT to the MM phono stage the magic happens. You would never use a SUT into a MC phono stage b/c for sure you will overload the system.
If you live in the Boston area I'd be more than willing to come over with several SUT just so you can hear what I'm talking (listening) about. 

I'll drive over this weekend!😎

Raul please don't wake me from my dream b/c it's such a beautiful place. Usually I have to wear Depends while dreaming or I'll soil the chair!