there's trichord and then there's....

Discussion in 'Hi-Fi and General Audio' started by johnhunt, Jul 19, 2003.

  1. johnhunt

    johnhunt recidivist

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  2. johnhunt

    jshack

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    Thanks.

    And you have a point?

    edited to add:

    discuss...
     
    jshack, Jul 19, 2003
    #2
  3. johnhunt

    michaelab desafinado

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    jshack - just do me a favour and put johnhunt on your ignore list OK? Your reply is certainly a lot less worthwhile than the original post.

    Now, back on topic...I wonder whether what those PS Audio units do is really significantly better than the Trichord conditioners. Sure, they claim to regenerate AC by doing an AC->DC->AC conversion but is it worth it? I doubt it personally.

    Michael.
     
    michaelab, Jul 20, 2003
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  4. johnhunt

    jshack

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    Yeah, right.

    And the point was?

    ATB michael.
     
    jshack, Jul 20, 2003
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  5. johnhunt

    wadia-miester Mighty Rearranger

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    Having played with one for a while, I can say it is some what more advanced than the TRichord in certain area's, as it's a complete mains reconstructor, with adjustable sine wave format output (this is at a price), the Trichord is pure and simple a mains isolation transformer, albeit a very good one.
    However the PS audio 600 In the system I tried it in, had the effect of 'Reducing the dynamic's' by a fair amount, it's also fair to say that the sound became cleaner and more open, had more depth, and had ultra good upper frequenices.
    It has a place for those people seeking the Nth degree of clean powerful extended sound, but not for the light of wallet WM

    PS (Pun there :D )
    The Accuphase is a very simular unit, as in it disassembles the incoming Ac to dc, and finaly being reconstructed back into ultra clean AC wave format
     
    wadia-miester, Jul 20, 2003
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  6. johnhunt

    timpy Snake Oil free!!!

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    When you get a lot of linear (i.e. not switched mode) power supplies working together, the perfect sinusoidal mains wave doesn't stand a chance. Every Linear supply has a switch on of 0.6 to 0.7 Volts away from zero potential (i.e. neutral level) therefore these devices ignore the first 0.7 Volts of the sine wave as it oscillates about 0V and only start conducting after this has been exceeded. As the sine wave makes this osciallation each side (+'ve and -'ve) of zero potential (neutral), this will occur 100 times per second for full wave rectification. Virtually everything that uses an internal DC supply works this way. The poor old sinusoidal waveform doesn't stand a chance, and that's before the local cabbies and your fridge radiate RF onto it etc. etc. etc.

    Therefore technically a mains re-constructor is the thing to have. I say technically.......... The last one I played with was £14k delivered to you door, not only did it reconstruct mains, but it allowed you to add your own noise harmonics to it if desired, in all sorts of fancy ways. I think it was 10 Kilowatt too, so even WM and GrahamN shouldn't be able to use up all of it's headroom ;) . Lovely piece of kit. I only wish I'd thought to try my hi-fi on it. Oh, and it was the size of a small fridge, and seemed to weigh the same as a small car when it had to be moved about.........and noisy :rolleyes:.......all those fans.....

    As for the merits of using one on a hi-fi? That's best left to your ears. One thought though, only Linn and Chord think it's advisable to use a Switched Mode power supply in their amps, everyone else shys away from them for many a good reason, and it isn't cost (it used to be reliability, but not so much these days), everyone else has stayed with the aforementioned linear supplys.

    Now a mains re-constructor, well that's the biggest switched mode power supply you're ever likely to see, and then for luck (and to make it work), it re-assembles it all again. From my experience, the "perfect-ness" of their reconstructed sine wave depends on the load, but I expect a Hi-fi orientated one has got around this. Now you can argue that the switched mode bit is in a seperate box, and so radiated emissions should be minimal, and as mains reconstructor by definition, conducted emissions should be zero. But would you be able to sleep at night worrying about it?

    Even if it all works fine, I'll wager that the majority of your kit you're going to feed with it, will have a linear supply in it. I think I've gone full circle now ;) :D:D:D:D

    Cheers
     
    timpy, Jul 20, 2003
    #6
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