Stop calling the Sansui Eight Deluxe the "Engineer's Receiver"

Discussion in 'Exclusively Sansui' started by Robisme, Dec 23, 2016.

  1. Djcoolray

    Djcoolray Addicted Member

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    But you have realize that Sansui intentionally vamboozeled its customer base all knowing that a deluxe model would draw interest. So the company chose to sell an inferior model to reap additional profits by cheaply extending the manufacture of the receiver and advertising it as better. Look how many people thought the Deluxe model was better because deluxe generally means it's a better model....
     
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  2. captouch

    captouch AK Subscriber Subscriber

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    But if the amp design was more advanced, I wouldn't say bamboozeled. They giveth and taketh away. :)
     
  3. MER71

    MER71 Super Member

    Which one sounds better???
     
  4. bluesky

    bluesky Addicted Member

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    Which one is better? :)
     
  5. Robisme

    Robisme Sansui Enthusiast Subscriber

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    The Eight Deluxe is the better sounding, more advanced receiver. But, there was cost cutting.

    Rob
     
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  6. Robisme

    Robisme Sansui Enthusiast Subscriber

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    It is a very rare ad that I have only seen in the tiny web pic.

    Here is what it says.

    "Some time ago, Sansui engineers were given a blank check. "Create the finest receiver in the world today". They were told "put in everything
    you ever wanted to see in your own equipment". And that's what they did. Today the Sansui Eight is a reality. The proudest achievement of a company
    renowned the world over as a leader in sound reproduction".

    So that's why the Sansui Eight is called the engineers receiver.

    And for the record, I am ignorant on many subjects. It's not a bad thing, just a word that sounds bad.

    Rob
     

     

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  7. ConradH

    ConradH Addicted Member

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    Everybody says "cost cutting" like it's a bad thing. Every successful product ever made, in fact everything ever engineered, is a symphony of compromises. There are no completely blank checks, though sometimes the line where you write the number is quite long. How good something is reflects the skill of the designers in making compromises. Otherwise, you'd end up fabricating every single nut and bolt and capacitor and resistor in-house to meet an impossible standard of quality that nobody on the planet could afford.
     
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  8. Robisme

    Robisme Sansui Enthusiast Subscriber

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    I just used the cost cutting term to support my point. IMO, Sansui did the cost cutting in the right places, and focused on the circuit designs.

    Rob
     
  9. ConradH

    ConradH Addicted Member

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    Forgot to add, yes, Sansui was indeed pretty good at it!
     
  10. bolero

    bolero Well-Known Member

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    I am curious, is it possible to add a constant current source to an 8?
     
  11. Trnsfmr

    Trnsfmr Well-Known Member

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    Yes, not simple, but it can be done. To understand how this circuitry works and how to go about doing that, I would suggest Doug Self's book, Self On Audio. I have a whole page about this subject on my site.

    http://www.qrxrestore.com/differential-current-balance/
     
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  12. RandyFloyd76

    RandyFloyd76 AK Subscriber Subscriber

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    My Eight Deluxe has both the engraved face plate and the solid aluminum billet knobs..........hmm o_O

    And yes in terms of sonic attributes, nothing in my stable including a 9090db and 8080 can touch it. Except of course my AU-8500 which is a whole different can of worms......hmm o_O
     
  13. sKiZo

    sKiZo Hates received: 8641 Subscriber

    Most of these super sensitive adjustments had to be made powered up. What are the chances the average bench tech ended up frying the units they worked on?

    PS ... CCS is one of the main selling points for deciding on a VTA board for my Dynaco clone amp. That feature was added back in 2012 - Just way more stable under load. Gone are the individual set and cross fingers pots and fixed resistance compromises. Those tiny lil LM334 ICs take all the guesswork out of maintaining perfect splitter balance with corresponding reduction in distortion.

    [​IMG]
     
  14. Robisme

    Robisme Sansui Enthusiast Subscriber

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    Very interesting. How about a pic of the face of the receiver, and a shot of the set screw in the tone control knobs? Never seen this before. Only on the tuning knob.

    The knobs on my Eight Deluxe are very thick aluminum, but do have a plastic insert inside to attach to the splined shaft.

    Rob
     
  15. ConradH

    ConradH Addicted Member

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    Everything's connected to everything and making fundamental changes in an amp design can have unanticipated consequences. That's why developing decent mods takes so long. A problem I've had with adding current mirrors is that the clipping behavior, which might have been excellent before, has spikes or other issues on the negative rail. That's the reason for having it done by somebody that's been down the road a few times and ironed out all the issues.
     
  16. LBPete

    LBPete Rolling Along Subscriber

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    The only way "blank check" engineering works is if your customers are also willing to use a blank check to buy it. Please keep in mind that the value of the yen decreased significantly during the 1970s. All Japanese manufactures that depended on exports needed to "decontent" their products to maintain price points. Here's a link to a thread discussing the exchange rate issue. There was roughly a 30% decrease in the value of the yen between the start of production for the Eight and the end of production for the Eight Deluxe. So don't accuse Sansui of decreasing content to increase profits. They decreased content to stay in business.

    - Pete
     

     

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  17. Trnsfmr

    Trnsfmr Well-Known Member

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    Conrad,
    Doug Self talks about the current mirror in his books. It is his preferred way of setting up the front end of a complementary lab type amplifier. I think that the mirror adds coloration that I do not like. The later Yamaha's use the current mirror, and a lot of other amps in the 80's and 90's that I do not like. It does more than supply current, it causes amplification to occur as the differential pair meets the constant demand of the mirror, that their currents be balanced. My opinion is that the only point when the currents should be balanced is when their is no signal.

    Early on, as I mentioned, Yamaha did this in the CA1000 without a current mirror. I think that amp is probably the best one they ever made, especially when upgraded with new caps, and film caps for all the coupling between stages.
     
  18. Dswankey

    Dswankey Super Member

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    Thanks for clarifying not sure why I thought that.
     
  19. saunadog

    saunadog Well-Known Member

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    A little fun I had with an image editing website (yes, I have too much time on my hands!) I own an Eight myself, so it made it all worthwhile :)
    Hope there's no copyright infringement...

    FOTOR COMPLETED PANEL.jpg
     
    Last edited: Dec 27, 2016
  20. Robisme

    Robisme Sansui Enthusiast Subscriber

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    Nice. Saved it.

    Rob
     

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