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Old 25th December 2015, 03:18 PM   #1
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Default Better rectifier for the SIT 1

I have had my SIT 1s for a couple of years. The new has worn off, they are paid for, I know I will never not use them.

At Jeff Day's Blog he extols the virtues of the audio discoveries of a Mr. Yazaki of SPEC CORPORATION. Mr. Yazaki is one of those extraordinary Japanese audiophiles who is on the relentless search for what he calls REAL SOUND. His company makes extraordinary products, none of which I have ever heard. His great value to me is like, Mr. Pass, he is generous with his knowledge and shares what he has found with those who will listen to him. I cannot imagine many who would give away such a "trade secret" but then I am familiar with Mr. Pass so I know this does happen.

Like so many Japanese ultra-audiophiles he admires Western Electric components and is intimately familiar with, probably, every tube and horn loudspeaker that has ever been made.

He is very particular about the components he uses within his amplifiers and has surveyed more than I would be able to in three or four lifetimes.

One suggestion he made really stuck out for me. It was this rectifier: STTH6110TV.

He claimed it was as good as any tube rectifier he had ever heard. One initially scoffs at such talk. I have tried different SS rectifiers in stuff I have assembled and never thought they made much difference. Certainly some sound better than others but it usually so subtle that one tends to dismiss the differences. Still one continually hopes there is such a thing as a SS rectifier that sounds like a good tubed rectifier, especially for components that cannot use them.

My SALAS phono amp was the first recipient of these.

When I first played a record with these installed I thought I was hallucinating or was so desirous of a miraculous change that I had simply fallen for that typical audio fallacy of belief trumping reality. After many weeks of listening it could no longer be chalked up to auto-suggestion - there is something extraordinary about this rectifier.

The sense of space is psychedelic. The sound extends well beyond the loudspeakers in every dimension. There is a purity and a warmth of tone, along with no loss of detail. It is as if one has been able to use a directly heated tubed rectifier on a 44 volts rail. The high frequencies have lost the last vestiges of tizziness. Of course, it all sounds too good to be true. But it is true.

So, never being satisfied it took me about a month to get the necessary courage to install these in my precious SIT 1s.

Yesterday was a good day to make the change. The are in a "two per" package so two are required to replace a full wave bridge.

Needless to say one of the best qualities of the SIT 1s are their spaciousness and the BIG sound they allow the loudspeaker to project. All I can say is that they are now even bigger and more spacious. The same qualities they gave the phono amp are again given to the SIT 1s.

I suggest to the beloved Mr. Pass that I think these might be something to investigate.

I had tended to agree with Mr. Pass that component enthusiasm can be silly; either the component did basically nothing or just as likely did harm to the sound.

I have no idea how many others might have an interest in doing this. I would love to hear if someone else has the same experience. I would especially enjoy Mr. Pass giving them a try. In my most unhumble opinion, they take the SIT 1s to the next level.

My SIT 1s are used above 500 hz to drive JBL 2441s with the TrueExtent diaphragms. Below that I use a J2. Needless to say they will be installed there very soon. I figured the SIT 1s would be the more important place for these, being a single-ended circuit, but I suspect I will get a similar result with them in the J2s.

Upon hearing what these things can do one can only assume the rectifier is, currently, the weakest link in the solid state amplifier and now there is no need to suffer that weakness.

With sincere thanks to Mr. Pass and Mr. Yazaki,
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Old 25th December 2015, 05:29 PM   #2
wdecho is offline wdecho  United States
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Do you have a link on this rectifier. Mouser shows a 1 and 2 version.
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Old 25th December 2015, 06:19 PM   #3
massimo is offline massimo  Italy
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Check the datasheet http://www.st.com/st-web-ui/static/a...CD00096489.pdf
Only antiparallel duals V2 are stocked by Mouser and sold by the unit. They are also quite pricey...
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Old 25th December 2015, 06:25 PM   #4
generg is offline generg  Germany
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STTH6110TV2 STMicroelectronics | Diskrete Halbleiterprodukte | DigiKey

and the pdf
Attached Files
File Type: pdf CD00096489.pdf (148.3 KB, 99 views)
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Old 25th December 2015, 06:26 PM   #5
generg is offline generg  Germany
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massimo faster than me…..

:-))))
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Old 25th December 2015, 06:33 PM   #6
wdecho is offline wdecho  United States
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I thought that was the one he was referring to, the one mouser does not have in stock. Thanks guys.

What was confusing was Mouser shows a very different looking STTH6110TV2 but the data sheet shows a same looking 1 & 2.

http://www.mouser.com/ProductDetail/...A1J2crVjUsQ%3d

Last edited by wdecho; 25th December 2015 at 06:37 PM.
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Old 25th December 2015, 06:42 PM   #7
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Quote:
Originally Posted by rickmcinnis View Post
I had tended to agree with Mr. Pass that component enthusiasm can be silly; either the component did basically nothing or just as likely did harm to the sound.
Actually I have a three part response.

1) That is not my actual position, as I have found numerous components
which are at least interesting, if not always better. Some commercial
offerings at high price - maybe not so much.

2) I don't concentrate on special "peripheral" components all that much,
lest they detract from the appreciation of the central element of a design.
You are then free to tart it up all you like. Actually you will find that PL uses
special rectifiers, that is to say fast/soft recovery types.

3) This is all entertainment, and the equipment only supports an illusion
anyway, so have at it and have fun.

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Old 25th December 2015, 07:26 PM   #8
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Default Excuse my clumsy paraphrase

I was trying to be succinct.

My intention was to point out that you do not in the FW line ((which is all I can (barely) afford)) use super tweaky components. What is done with the PASS stuff I can only imagine ...

Yes, it is entertainment but with only so many hours to live and that many fewer available for listening to music sometimes these components are worth the cost.

I think I can remember a few words of the doubting Thomas when it comes to many of the "audiophile" components. This rectifier is certainly not aimed at the audio market but seems to be very well suited.

Reminded me of your first acquaintance with the SEMISOUTH SITs.

Nonetheless if the opportunity ever arises I would love to hear what you think of them.

Thanks for the amplifiers!
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Old 25th December 2015, 07:36 PM   #9
infinia is offline infinia  United States
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Faster Parts for 50/60Hz power K.
what did you use to clean up the RFI/EMI spray from increase snap-off over slow diodes?
next up PS snubber improvements
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Old 25th December 2015, 07:59 PM   #10
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Default Certainly worth a try

But I can assure you what I am hearing tells me that they just might not get any noticeable benefit from snubbing.

At least not at this point in my listening to them with the phono amp - I admit I have not had them in the FW amps long enough to be sure.
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