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So, the Objective2 headphone amp - designed entirely around the measurements? (PLEASE READ RULES BEFORE POSTING)

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  1. Beefy

    Quote:

    Because the O2 will clip at the input stage regardless of volume setting. The Mini3 will only clip if the volume is turned way up.
     
  2. JamesMcProgger


    Quote:


    how can you tell if the final design isnt even finish? ... or without trying one?
     
  3. n3rdling
    It's only been explained like 6 times
     
  4. kwkarth


    Quote:

    Tongue tucked firmly in cheek, as they say....[​IMG]
     
     
  5. JamesMcProgger


    Quote:


    mmm maybe it was deleted with the other comments [​IMG]
     
  6. Shike


    Quote:
     
    Ah, the location of the pot at the end rather than before at the signal input.  Still, we're only seeing a couple sources at best pop-up with enough voltage to even begin causing an issue.
     
     
  7. upstateguy

     
    Quote:
     
    Yeah, me too... [​IMG]
     
     
     
  8. kwkarth


    Quote:
    Ahh..  [​IMG]
     
     
     
  9. fishski13


    Quote:
     
    your gain setting is limited though.  if using a bog standard 2Vrms source, you need to keep the gain at 3.1x or lower or risk clipping at the input.  as stated before, go above this gain, and the signal will be clipping at the input no matter where the pot is sitting.  if using a lower V source, you have more flexibility with the gain.  do you need a gain higher than 3.1x with a 2Vrms source for the K601 - probably not.
     
     

     
     
     
  10. deadlylover
    I wish I had read the last few pages of this thread before I wasted an hour of my life wondering if I ballsed up the Obj2. When it sees the full fury of my source, really nasty stuff starts happening, I'm running it from AC with a gain of 3(ish).
     
    Sorry for no impressions guys, I didn't want to balls up my friend's LCD-2 (I was using the ibuds for testing =P).
     
    All I can really add is that it's a pretty simple build, first timers should have no probs building this.
     
  11. fishski13


    Quote:
     
    what is your source? 
     
     
     
  12. deadlylover
    Quote:
     
    Audio-gd DAC19, I have no idea what it outputs.
     
  13. Shike


    Quote:

    How did you build it exactly - I don't believe the PCB is available yet is it?  You could still have messed it up :\
     
    EDIT:
     
    Seems your DAC outputs 2.5V, lowering the gain to around 2-2.5x seems to be the best solution.
     
     
  14. deadlylover
    Quote:
     
    Point to point, I may or may not have ballsed it up.
     
    But considering it works just fine as long as my volume control on foobar is low, I really don't think I ballsed it up =/.
     
    Think I've got a dodgy 2068?
     
  15. Shike


    Quote:


    See edit, seems like you may have pushed the gain too hard (your Audio-GD outputs 2.5V).
     
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