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chord qutest owners question

Discussion in 'audio' started by hifi-dog, Jul 28, 2022.

  1. Kirk

    Kirk pfm Member

    It can run a little warm.
     
    cb01 and hifi-dog like this.
  2. hifi-dog

    hifi-dog pfm Member

    What is also clear is that the dac is now probably earthed.. I had to fudge a bit if wire to my supernaits earthing post to stop a hum.. it’s now not needed.
     
    webster and cb01 like this.
  3. carruthersesq

    carruthersesq pfm Member

    Can you please confirm the LMPS voltage required for a Qutest?
     
    cb01 likes this.
  4. Tim Jones

    Tim Jones pfm Member

    An obvious point here is that Rob Watts has gone into some detail as to why it's an illusion to run your Qutest off an "upgrade" linear supply. I think Keith is quoting him here, and this aligns with things he's (very helpfully) set out in one or two of the mags:

    More Rob Wattage | Audio Science Review (ASR) Forum

    As a side note, I'm currently running two of Rob's DAC designs - a DPA PDM1.2 and a Qutest - side by side. Very interesting to hear what 25 years of evolution in digital design sounds like.
     
    cb01 likes this.
  5. cb01

    cb01 AES Member, Retired A/V Forensic Professional

    5v/2a
     
    carruthersesq likes this.
  6. cb01

    cb01 AES Member, Retired A/V Forensic Professional

    Well, all that is immediately invalid because I've heard what I've heard.

    Among many other articulable improvements, I can point out with a laser pointer on my wall that the new LPS creates a soundstage that is 2ft wider and 3ft taller than with the Allo Shanti. Which did, itself, create a physically larger soundstage than the factory SMPS. It's an empirical observation.
     
  7. hifi-dog

    hifi-dog pfm Member

    I’ll swap back to the supplied smps today but I can say I am very happy with the more relaxed and spacious sounding mcru supply. If that’s ground plane modulation it rfi I’m not that bothered as to my ear it is better
     
    cb01 likes this.
  8. Mike Hughes

    Mike Hughes pfm Member

    Given how little Watts knows about good accessible competent design as opposed to his Fisher Price aesthetic I struggle to take anything he says too seriously. I really like my Hugo TT2. It does indeed run hot. That concerns me far less than having to look at it.
     
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  9. hifi-dog

    hifi-dog pfm Member

    Well that was a quick and obvious win to the mcru to my ears. Aside from re introducing the buzz related to lack of earth the smps is lighter, brighter and less spacious . Whether one is technically better is beyond me but the richer bigger sound of the linear supply suits my Naim/ Atc combo better.
     
    cb01 and webster like this.
  10. Alex S

    Alex S carbon based lifeform

    Interesting. I just went back to the SMPS since there's a slight buzz with the Sean Jacobs DC2 LPSU. The buzz is still there, just, but less so. As for sonics, the 2Qute only does the TV via toslink since my main dac only has USB and Coax. Not here to argue, we can do as we please, but with reference to ground loops, try it and see. This is with a new to me Leak Stereo 20 that is certainly able to pick up ground issues in ways my previous amp never did, that was silent with anything.

    I'm agnostic on Chord dacs in particular but a firm believer in linear supplies generally. I also know that a cheap SMPS can introduce system noise, regardless of what it does for a Chord dac, a thing Naim are picky about.
     
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  11. hifi-dog

    hifi-dog pfm Member

    The supplied smps caused a hum which I cured with a piece of wire from the phono earthing post to the outer of a din socket.. the mcru is silent with no need for the wire.. won’t be going back to the chord smps
     
    cb01 likes this.

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