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Walnut Hi-Fi V2 WAV (& MP3) Player by wt - :ok_hand: screenless budget killer combo DAP/Amp :ok_hand:

Discussion in 'Portable Source Gear' started by vapman, Dec 8, 2016.
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  1. T.R.A.N.C.E.
     
    Very good eye. I asked the Walnut creator and he said those blue resistors were only used to correct a circuit miscalculation which has been fixed in later walnuts [​IMG] 
     
  2. hakuzen

    Sure!
    That's the best way to use sensible low impedance phones with Walnut.
     
    Walnut-NX1a_uMR3SenferUEs.png
     
    Of course, there is still the roll-off at both sides, proper of Walnut.
     
    Most flat, and low output impedance amplifiers, would serve; there are small and cheap ones, Topping NX1 is one of them, so the combo price does not get increased too much.
     
    vapman and peter123 like this.
  3. vapman
    Thank you time and time again for all your measurements. Seeing this vs. all the Zishan measurements has been really interesting. Also, I thought the bass rolloff would be helped with an external amp on the measurements. It still sounds kind of off with sub bass (sub 50Hz) test tracks when you use the internal amp. Well, maybe I will figure out why that happens when I get around to messing with parts on a Walnut.
     
    I have been wanting to run the Walnut into a tube amp, but don't have one at this time...
     
    Merry Christmas to you and all other Walnutters!
     
  4. notamethlab
    A few posts ago I read you guys had a "pop" when connecting your iems, I too had that problem. Today I switched opamp from the stock Walnut to the LME49720NA and the "pop" is gone. The LME49720 is about $4, seems like a good and inexpensive solution.
     
    vapman and hqssui like this.
  5. vapman

    Interesting. Both stock (of course) and burson v5i have the pop.
     
  6. T.R.A.N.C.E.
    I did find some opamps reduced the pop slightly but not get rid of it. Depends on what hp your using for what pop intensity your hearing though. Also found changing the filter capacitor reduced the pop even further to the point I wouldn't call it a pop.
     
  7. rockingthearies
    Merry Christmas all, my walnut is being shipped today!
     
    nick n likes this.
  8. nick n
    Also incoming OPA2132P  to try out, saw that it had very little to no DC offset, and apparently a neutral type of sound.
     
    I see now searching the thread VAPMAN has tried it, my plan is to use it with different caps so will see.
     
  9. vapman
    I have the 2132PA. I will probably swap my Burson V5i with the 2132 soon. I find it to have better soundstage and a more airy sound than NE5532 but with a less prominent midrange. I think the only difference in the 2132P and 2132PA is some power ratings?
     
  10. nick n

    Those impressions are what I read elsewhere also. Plus not really overemphasizing anything too much.
    Some minor differences.
     
    this thread is sending me down a bad rabbithole, I need to slow down.
     
  11. Hutnicks

    No, you need more expensive exotic booteek caps galore:)
     
  12. iJay
    The mailman delivered Monk+ today! My budget rig is now complete! Merry Christmas Walnutters!

    IMG_0300.jpg
     
    vapman, nick n and groucho69 like this.
  13. nick n

    ohhhh kk then.
     
    How about some:
     
    1. Roederstein 1000uf 16v EKS LL ( 10mm so will fit the space for the power )
     
    and for the two outputs
    1. K50-35 47uf 63v Oxide Electrolytic ( Russian NOS from 1992 )
    ty.jpg
     
    1. FRAKO 47uf 25v KEJ Axial Electrolytic ( German )
    s-l1600.jpg
     
    ^ are these booteek enough or simply obscure and hip? It's a fine line.[​IMG]
     
    Are there Soviet era Opamps? I'll check that out. Be neat to put a Soviet spec one together to run some Soviet orthos.
     
    =oooh yesss there
    Russian-AMP-OPERATIONAL-AMPLIFIER-Soviet-USSR-574UD2A-Op-Amps-_1.jpg
     
    are need to ask about mono vs stereo [​IMG] 
     
  14. Hutnicks

    Soviets knocked off everything (still do) so you can probably find an opamp equiv for just about anything.
     
    Capwise.  http://duelundaudio.blogspot.ca/  
     
    These yoyo's build them up to 4 figures in price. Perfect to get the most out of yer 20 buck player[​IMG]
     
  15. hung031086
    My walnut just arrived today. It's really smaller than i thought :)

    [​IMG]
     
    kfarndog and groucho69 like this.
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