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Chord Mojo DAC-amp ☆★►FAQ in 3rd post!◄★☆

Discussion in 'Portable Source Gear' started by Mython, Oct 14, 2015.
  1. JaZZ Contributor
     
    That's not entirely correct. The line-out stage is an amp. The Mojo just renounces an additional headphone amp.
     
  2. GRUMPYOLDGUY

    Isn't the only thing between the DAC output and the 3.5mm connector an I-to-V converter?

    This is not an amp.
     
  3. Music Alchemist
     
    To be more specific, the headphone outputs are driven by the analog output stage of the DAC, which does have "a very high performance op-amp with a discrete op-stage as a hybrid with a single global feedback path." (Nearly every other DAC has an op-amp or something similar too to amplify the signal before sending it to an external amp.) I think most who are interested in Chord DACs are already aware that there is no separate amp section.
     
    More info here: http://www.head-fi.org/t/702787/chord-hugo/1830#post_10459450
     
    Clarification: the Mojo uses parallel transistors.
     
    Weatherlight likes this.
  4. JaZZ Contributor
    The DAC output (stage) is an amp.
     
    Music Alchemist beat me to it. – Note that «op amp» in this case means «output amp», not «operational amplifier».
     
  5. GRUMPYOLDGUY

    Is mojo the same as hugo? The block diagrams I saw suggest otherwise.
     
  6. GRUMPYOLDGUY

    And what is an "output amp" designed with if not an op amp??
     
  7. Music Alchemist
     
    If by "the same" you mean that there is no separate amp section, then yes. But there are obviously many other differences.
     
  8. GRUMPYOLDGUY

    By the same I mean there is an op amp in the Mojo analog path. I've been lead numerous times to believe this is not the case with Mojo... so please, could you post the diagram or source that suggests there is an op amp in the Mojo?
     
  9. jwbrent

    I, too, have been led to believe from John and Rob's comments there is no op amp in the analog path.
     
  10. theveterans
     
    Isn't it discrete output stage (JFET, etc.) and not op amp?
     
  11. Music Alchemist
     
    From here:
     
     
    MojoPCB.jpg
     
    Some other relevant info:
     
    http://www.head-fi.org/t/702787/chord-hugo/10320#post_11527678
     
     
    https://en.wikipedia.org/wiki/Operational_amplifier
     
     
    http://electronics.stackexchange.com/questions/94344/opamp-vs-transistor
     
     
    It would appear that op-amps and transistors can in some cases be synonymous.
     
    Peter Hyatt likes this.
  12. masterpfa
    I'm not sure if you have found your solution yet, but the Chord Mojo accessory kit contains OTG, Toslink etc and at a reasonable price too (less than it cost me to get my SySconcept cable delivered to the UK.

    May not be the ideal solution but one that is readily available.
     
  13. Deftone
     
    imo the most enjoyable headphones to use are the ones that dont need any mods or EQ, the rabbit hole can seem endless.
     
    headmanPL and god-bluff like this.
  14. Music Alchemist
    [​IMG]
     
    Black or silver? That is the question.
     
    So how many of you fellow Mojo'ers are thinkin' of adding the Hugo 2 to your systems?
     
    I think the ultimate compliment to the Mojo is that listening to it is such a revelation that it tempts me to upgrade to a higher-end Chord DAC sooner than planned.
     
    Deftone and Peter Hyatt like this.
  15. howdy
    Im thinking of getting one but the Hugo 1 is what im looking at and black.
     

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