Rerurn to Romy the Cat's Site

In the Forum: Analog Playback
In the Thread: Phono stages with SU-1
Post Subject: How to use ET transforms: an interesting question.Posted by Romy the Cat on: 11/24/2007

 genesis168 wrote:
I am a owner of an ET SU-1 and would like to know what phono stage would go best with it. Would a Lamm LP2 be a good match?Will be using a Dynavector XV1s with it. Thanks in advance
It is truly an interesting question. Expressive Technologies’ magnetic in my view has some absolutely unique sonic consequences to Sound and it might be very much benefiter or perhaps defeated by use less appropriate for the given transformer phonostage or cartridge.

I owned two SU-1 transformers and one SU-2. The SU-2 is different then SU-1; it is a toroidal version of SU-1. The SU-2 takes the SU-1 benefits slightly further but still it remains within the same Expressive Technologies’ family sound: dramatically increase dynamic, extend lower bass, very magically slow down lower mid-range and upperbass decay, uniquely “recompile” the entire Sound making all individual sound and notes as a part of “whole” instead of individual events. I evenly sold both of my SU-1 and left only with one SU-2, SU-2 has slight sonic advantages and it is MUCH smaller. Hey, do you know how I was selling one of my SU-1? Read the story:

With all my use of SU-1 and SU-2 I did not detects that they have any special attitude to special cartridges.  I used Shelters, Koetsu, few Denons, few Ortofons all of them were fine with ET transformers. They were the cartridges with different own impedance and with different output voltage – all of them were benefited by the “Expressivinization”. The lower of then was Denon with 0.12mV output and the highest was 3mV Ortofon SPU. I even liked what ET did with 5mV moving-iron Grado, and I disregarded all capacitance loading issues. Of course in all those cases you need to properly load each cartridge in accordance to own demands: ETs are 26dB fain, so multiply the loading resistor to 676 and go from there. I am sure your Dynavector XV1 should be very fine as well.

With phonostages is more complicated. I do not have a lot of exposure, at least successful exposure, to different phonocorrectors with ET transformers. When I got my very first SU-1 I had regular 834P and I liked the result tremendously. Since then I use only ET transformers with my reference arm and I some time to time (in past, not anymore) was looking for different better phonostages. I was all together perhaps 5-6 “expensive” phonostages and with not of them I was not able to get what I was able to hear from 834P, at that time it was already 2x834PT. The ET-2x834PT is a truly poltergeist-transparent combination and I always feel that get out of it some musical ghost presents that I never got form other correctors. It has to be said that I use in second stage some kind of 12AX7 aberration with mutual conductance much more then usual 12AX7. Soon I  will be converting the ET and 2x834PT into one atomic unit:

I also had LP2, I have to admit the I hate that phonostage. The LP2 own step up transformer makes LP2 to sound like a cheap SS transistor radio. The MM input of LP2 is slightly better but still is not so good. I have writhe about my disappointment with LP2 in many places:

 When I drove LP2’s MM input with SU-1 I had even worth result then with LP2’s default transformer. I have no deal why. I got rich the bogus 470pF shunt the Lamm has at LP2’s MM input stage, it helped little. I head perhaps 6-7 LP2s and everywhere I head the same flat washy-washy sound that I did not like. Perhaps you mileage will wary but for me the LP2 was very unsuccessful phonocorrectors.

It would be very interesting to try the Expressive Technologies own phonostage... I saw it and it was interesting...

Rgs, the Cat

Rerurn to Romy the Cat's Site