Phono Preamp. With transformer or fully active

I specifically chose the 4722 to avoid the appearance of throwing another manufacturer under the bus so to speak.  The only place I have seen signal level have an effect on frequency response in SUT's was with units wound on cores with poor low level permeability in which case the bass disappears. 

I'm not sure of the origins of the cult of the 4722 but I do think you can do much better.  The jensens are nice but I do not consider the use of the rather heavy secondary load in addition to a Zobel as a sonically acceptable solution.  

dave

I do not consider the use of the rather heavy secondary load in addition to a Zobel as a sonically acceptable solution.  

FWIW they *are* designed for that. I totally agree regarding your comments about bad core design- my comments  presume a decent transformer to start with :) ...   I think the 4722 cult has to do with a recording engineer named Eddie Ciletti.

Boy;

Who would have thought SUT’s are so controversial in application. My 2 buddies , that are LP guys, both have fully active with lots of adjustability.
Their systems sound superb, with a Lyra & Purpleheart cartridges 
I think it’s best to start fully active, as it appears
Being a vinyl , newby, 
Then listen and see how it goes

jeff

I might have been a little unclear above when I typed:

I do not consider the use of the rather heavy secondary load in addition to a Zobel as a sonically acceptable solution.

That should read:
I do not consider the use of the rather heavy secondary load in the form of a Zobel as a sonically acceptable solution.

I will add that the load from the Zobel is at higher frequencies only.

Jensen named the parts of the Zobel Rdamp and Cdamp which clearly tells its purpose. I do not know of any phono stage inputs with those parts intentionally in place. It would be interesting to see the response without the Zobel in place to see what it is hiding. I for one do not have a problem with a Low Q 2-5dB peak nearing 200kHz and find that any resistance or network added to tame it does more harm than good.  The 4722 or other vintage mic transformer turned SUT showing the peak in the 20-40kHz range is another situation altogether.

http://www.intactaudio.com/images/SUT%20white%20paper/4722%20vs%20emia.png

dave

Jensen named the parts of the Zobel Rdamp and Cdamp which clearly tells its purpose. I do not know of any phono stage inputs with those parts intentionally in place

I do, it retails for $3500 and has had stellar reviews.

It would be interesting to see the response without the Zobel in place to see what it is hiding.

It supposedly minimises internal ringing in the transformer.
If you simulate the load of the cartridge and run a square wave through the scope you can adjust the zobel to suit. In the afroementioned phono stage I have personally exerimented with altering the zobel to match the internal imedance of the cartridge, it is clearly audible.

The reality is that transformers are non linear in both amplitude and more importantly phase. It is the phase anomalies that kill the music - musical timing and natural harmonics are destroyed by phase anomalies.

In my experience, with an array of moving coil stepup devices to hand including both tube and solid state active, and many much vaunted transformers, is that active devices, for all their faults are more musically compelling.

Play any jazz record where there are changes in tempo within the track and a comparison between a competent active stage and a competent transformer will highlight the transformers destruction of phase and timing. Look at the bottom end in your graphs - its there for all to see.