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The Zishan dsd's corner

Discussion in 'Portable Source Gear' started by neog007, Nov 17, 2016.
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  1. Themilkman46290
    Well I would secure that because the battery in my z3 got loose and eventually got a whole in it from rubbing the metal from the sd card slot and it started stinking and was getting warm. In the end I changed it for a larger battery
     
  2. tisyu
    Will do once I get home after uni. Thanks!
     
  3. soundblast75
    What is the best opamp, just saw this Russian video, good review by CyncerTech or something.
    Anyway, apparently sound does change quite drastically ,so I'm willing to open this brick, is there a page here with all the info and which opamps and how to get not a fake one etc.
    Huge thanks in advance
     
  4. Themilkman46290
    There are many options but alot seem to like the muses02, burson v5i (need to remove socket for this to fit) ad8620, I like the muses8920 in the socket for when I want something bassy, but I like the warmth of ad823 sometimes too, some people like the ad8066, I felt it a bit flat, the v5i is good but pricey and so are the muses02/01/03,alot of people recommend the op1622 , and you can try lme49720,opa2132,ad823,lme6172.
     
    soundblast75 and DBaldock9 like this.
  5. jipkai123
    Hello, recently my zishan z2 3.5mm jack do not output audio for the left channel but the line out 3.5mm jack have audio for both channels. would replacing the 3.5mm jack help? Also is there any way to lower the line out jack volume as my external amplifier even with low gain is too loud on the lowest setting.
     
  6. Themilkman46290
    It might be the solution, the 3.5mm Jack is delicate, alot of people have that problem, and about the line out, I am not sure.

    but someone here might be able to answer that
     
  7. jipkai123
    Also would upgrading from the z2 to the zishan dsd with the akm4497 dac be an audible upgrade if i am using the line out for both the players. The difference between z2 and z3 is just the screen as the dac and amp components are the same?
     
  8. Themilkman46290
    The ak4497 doesn't have a line out like the z1,z2 or z3
    Only the ak4490 and ak4495 versions have a line out
    And yes, there is an improvement with the 2 models I mentioned, they have a better highs then the z3 or z1 (don't have the z2) the ak4497 version is just ok when it's amped, I think it's good on its own but my amped dsd ak4490 does sound better but it isn't very convenient on the go

    Basically the dsd ak4497 sounds almost as good as and amped z3 using a fiio a3, the dsd having better separation, much better highs and sub bass

    The ak4497 version has a 2.5mm balanced out instead of line out
     
    Last edited: Apr 4, 2019
  9. Themilkman46290
    Has anyone tried the opa627au in the dsd?

    How does it sound?

    I found it locally but wondering if it will work well in the dsd
     
    DBaldock9 likes this.
  10. DBaldock9
    I soldered a pair of 1-Channel OPA627AU SOIC op-amps onto a low-profile DIP-8 2-Channel adapter.
    It's a BrownDog 020302 adapter - and if you contact them, they will insert pins that don't have shoulders (which would normally hold the circuit board up off of the socket).
    Then I took a craft knife, and scraped some of the plastic away from the inside edges of the socket on the DSD - to clear the op-amp on the bottom of the adapter.
    When the low profile adapter (with trimmed pin length) is plugged in, it goes all the way down flush to the top of the socket, and is no taller than a standard DIP chip.

    I really like the sound of my OPA627AU op-amps.
    Right now, I have them in my Little Bear B4-X Dual Mono Tube Amp, driving my Wong Kuan Wae modified and re-cabled Vido earbuds.
     
    Themilkman46290 likes this.
  11. Merlin-PT
    It could be the output 3.5mm jack or the opamp in the socket.
    The socket opamp output only connects to the output 3.5mm jack connector, it doesn't connect to the line out.
    Make a test and replace the opamp in the socket, if problem persists, then the problem could be in the output connector.

    With a multimeter and Z2 powered off, you can test the electrical continuity of each one of the connector soldered legs in the Z2 PCB, to a inserted cable or inserted male jack terminals. Maybe the connector PCB legs need to be re-soldered or the connector needs to be replaced.
     
    HeyManslowdown97 and DBaldock9 like this.
  12. Themilkman46290
    So they do good in the dsd? How would you rate them against your other opamps?
     
  13. endia
    I tried many opamps (opa1622, opa1688, opa2209, opa189, opa2134, ad8620, ad823, ad797-my second choice, lme49720ha, lm6172, lma49990, muses8920 etc.) as lpf in my 4495 dsd;
    and finally settled on opa627s..

    it has the most balanced sound with high resolution and timbre. kinda warmish but has good treble extension too..
    not the deepest sub-bass but has enough extension for me but please pay attention that most of the times a jazz listener here.. and as always ymmv!
     
  14. F700
  15. DBaldock9
    Of the op-amps that fit in the DSD, the ones I like the best, are the OPA627AU and the OPA1622 (I have one on a low profile adapter, which I don't think is available any longer).
    The MUSES02 sounds good, as well - but seems to be more laid back (not as much of an open Sound Stage).

    NOTE: Since I normally use the Balanced Output, the op-amp in the socket is not in that signal path, so it doesn't affect the sound - only the AD8620ARZ, which I've installed in-place of the OP275 in the Low Pass Filters, are used for the 2.5mm TRRS.
     
    LaughMoreDaily likes this.
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