FIDELITY RESEARCH STEP-UP TRANSFORMERS

Dear chakster, You should write your poem about 47 Lab Cube
before they discontinued the precious. 

Sadly Miyabi 47 and its predecessors MCA,Standard also discontinued, but this is not the reason to ignore them. 

New Current Injection phono stages still available from several manufacturers for much higher price than my 47 Labs

If to give comment about  XF-1 L.

It's dead silent, SN ratio is superb, shielding is something special.
 
It's not the best also but it doesn't looked shy near upper league transformers
. 
So as about sound it has no colour but all details are present. It's pretty close to AN, Neumann etc. Close but some juice is missing. But really not much. I think  Denon AU-S1 MC Step Up is more versatile but for my liking XF-1L is better as it works only up to 3 ohms.
Although as about Denon  AU-S1 I am not believer that it can work from 3 up to 40 ohms. I would make a bet 20-40 ohms as the optimum range.

Dear @lohanimal  : All my SUT's were modified and the 340 outperforms almost any vintage or today SUT but the AU-1000 ( the weigth of this SUT: 12kg. and frequency response range : 5hz to 200khz . ) and others that I never experienced.

Audio Technica SUT's as the 1000T or 700T are really good too and its today  model seems to me as something to own and probably extremely hard to beat:

https://www.audio-technica.com/cms/accessories/1211e0cd29d5d0aa/index.html

As you I own an active phonolinestage device. Your Vendetta is a good one.

Even that I don't know your other cartridges you own I think that you need better carrtridges than your Transfiguration or Denon entry level 103 that I owned/own. You can stay with Transfiguration that are excellent quality performers like the Proteus one.

The SUT's you ask for are in the mediocrity/average range and could work with mediocre/average LOMC cartridges like your 103 but not for top performers.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

@rauliruegas 
I am somewhat surprised you don't know that the Transfiguration Temper V is an absolute top flight MC cartridge which holds its own against anything out there today.

The Shelter 501 Mk2 was recently re-tipped at Expert Vinyl and that's a very decent MC.

As to the DL103 being so lowly - that's interesting as the guy who makes Zanden amps uses one.

I keep that fora lot of listening because if my 4 and 5 yr old have a bad moment - it's £200 odd to replace - not over £2000...

In my various experiments I find that a great phono sectionis more important than the cartridge. I refuse to go over a certain price for a cartridge because its just a flipping magnet and thin wire - I've seeen Van Den Hul make them at shows - compare it to an equally priced say car/bike/watch an awful lot more skill and man hours go into making those items - but that's my 2 cents worth.

I hope you don't mind but I will email you directly about the AU340 mods.

thanks