FIDELITY RESEARCH STEP-UP TRANSFORMERS

I love the total lack of agreement on this forum at times :)

Both the FR64/FR7/SUT and the lightweight MM/modern MC Active stage may always be at loggerheads - my only way to resolve is to hear it.

@chakster the one you mentioned does allow different transformers, but isn't it a case of plugging and unplugging? I don't like to do that as most my tonearm cables have WBT connectors - not only that you should plug and unplug continuously.

It's better to plug/unplug not RCA connectors on the SUT side, but DIN connector on your tonearm when you want to switch from one to another. You just re-direct a cable (DIN) from one tonearm to another if needed. For this reason i designed custom made rack with open bottom for easy access to the tonearms. SUT swap on Luxman base is easy as changing tubes in the amp.  I also have WBT RCA on some cables. 

But this is not what i'm trying to say. 

Current-Injection phono stage for FR-7fz is the best solution, better than SUT 

Dear @lohanimal  : The stand alone Luxman unit came from the integrated phonolinepreamp Luxman C 5000A design.

I owned that unit and I know that those transformers ar not really top devices. Are small transformers with a limited frequency response band.

You can't go wrong with Audio Technica, Entré or Denon and its characteristics are rigth on what you are looking for and with very high quality level performances not like Luxman or even FR.

Btw, I still own the 103 because any one in analog has to owns it but it's not up to the today task standards of quality. Of course that for its price you can't ask for more.
Remember that that cartridge was designed in exclsive for radio stations and not for audiophiles. Yes, its cartridge motor function very well and that's why several last years buyers took it and with some modifications they sale to us as the 8th " world´s wonder " for big big dollars when they invested only a few coins on it: big bu$$ine$$ coming from  ignorant buyers

R.. 

Whilst a bit 'off-topic' everyone has a DL103 - they can provide a benchmark.
Does everyone have a Koetsu Redwood? A Shelter? a Lyra Titan? Let alone a Shun Mook..how does a person compare and track changes in a system? With a benchmark. 
I'm desperate to find what really floats my boat once and for all and want to try the Denon in a few arm/cart combos and plinths - why? it's a hobby - it's fun - it's popcorn for my mind and allows me also to banter with guys/gals like you...

Denon 103 with conical tip in 2020 - are you serious ? 
You like rolled-off sound ? 

Frequency response of the silver SUT from Luxman is within 15hz - 100kHz is very good for vinyl. Distortion ration 0.003 %, step up ratio is from 1:10 to 1:32. Multiple Electromagnetic shield. Excellent core material of Toroidal type. 

For example Denon AU-340 has 0.05 % distortion ratio, this is much higher distortion.