MC transformers - what do they sound like?

Dear Gregadd: Well, this is a mature phonopreamp design, part of our 10-12 years of hard/fun working about: testing and hearing, testing and hearing, etc, etc.

We use the best pasive and active parts ( not necessary the more expensive ones ), other than the desing it self we take care all over the whole " instrument ( phonopream ): our ultralow noise circuitry was specifically designed for very low output moving-coil cartridges. The outstanding CMRR of 120 dB at the input stage will reject any interference not present at the audio signal generated by the cartridge, ground plane design , ultra low noise power supply ( better than an alkalyne battery, at least in our design ) that is solid " steady " one: it has more than 40,000 uf of capacitance , bullet proof whole circuit protection, four layers circuit boards, very precise ( almost perfect ) circuit board lay out, good design execution, extremely trusty operation, no internal wires where the signal pass through ( every component is direct soldered to the circuit boards ), etc, etc, etc.. We don't left nothing to " destiny ".

Our phonopreamp had some " old/new " ideas, examples: all the best preamps use at their volume/attenuator a serie's resistors ( it does not matters if they choose doing through relays or ladder attenuators design ), at least two por volume position, in our design the signal pass ONLY for one resistor at any attenuator position.

Our design is a Current Drive one and this allow that the volume control attenuates the audio signal and the stage noise at the same time, resulting in outstanding signal-to-noise ratios and dynamic range.

Our whole design permit to have a preamplifier combining
the purity and transparency of a passive preamplifier with the speed, dynamics and drive of an active preamplifier.

What happen when you hear through our phonopream: SS signature? Tube signature?, not at all, only real music with all the music emotion.

Through our phonopreamp we have not only a different musical experiences but a new emotional one that we never experienced and that we even don't know it could exist in any audio system at any design/price.

Yes we are extremely proud of what we achieve over those working years.

Regards and enjoy the music.
Raul.

Wow, Raul- Not only impressive, but I would love to hear one in my system. When do you go into production ;~)

I think Raul should build a prototype and send it to me for evaluation.

Raul's system should be called "Shiva". All those arms!

Dear friends: Here are some facts about why exist the SUTs for LO cartridges ( at least is my point of view ):

- In the fifthies appear the MC LO cartridges ( As a fact: Ortofon invented in 1948. ). In that time all the phonopreamps were designed for HO cartridges MM/MI/etc. No one was in the design of high gain PP because no body need it.

- Ortofon and latter other MC LO cartridges never ask to the PP designers/builders to manufacture a high gain PP for their MC LO cartridges. What I mean is that never exist a cooperation job between the MC LO builders and the PP manufacturers.

- What was the comercial attitude of almost all MC LO cartridges builders?: to put on sale their MC LO cartridges along with a SUTs ( designed for it self ) for those MC LO cartridges.

- I can remember from Ortofon when they design the MC10, MC 20, Mc 30, Mc 2000, Mc 3000 and MC 5000, cartridges at the same time they offer the respective SUT: T 10, T 20, T 30, T 5000.

- Like Ortofon everybody do the same: Denon, Audiocraft, Fidelity Research, Koetsu, Micro Seiki, Accuphase, Dynavector, Highphonic, Audio Technica, Entre, etc, etc.

- In the mid-time what does the PP designers ( SS or tube ) for the development of a high gain PP?: almost nothing, almost all take the easy " cheap road " ( wrong/worst one ): that the customers buy SUTs along with their PP if they want to handle a LO cartridge. Some of the PP designers/builders incorporate in their " high gain " PP internal SUTs, exactly like today ones.

- No body take the challenge to design a HG PP with out SUTs. There are some exceptions: Curl, Levinson, Pass, Klyne, Classé, D'angostino, etc, etc,

- So we all are suffering the " easy road/ wrong road " that almost all designers/builders take it more than 55 years ago.

- All those comercial attitude never take into account us: the audio customers and never take into account the QUALITY MUSIC/SOUND REPRODUCTION. They don't care about in those times and many of them don't care about today.

Fortunatelly, in the last few years, some PP builders finally take the challenge ( others like me designed our self ones ) and we have some very good HG PP, many of them at very high price.

This change of comercial attitude: Bravo!!!!!!, could tell us that the best about is coming because the developtment of HG PPs are really " starting ", it is not a mature industry.

Regards and enjoy the music.
Raul.