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  1. Merlin-PT

    DIY Earbuds

    @robar There's a way for the wooden shells to get bigger and snap in the drivers. I don't know how it will sound because I didn't solder the drivers yet. I also wanted to make a dip in the shell, so it doesn't break/rip the drivers coil when attaching. This what I tried with the wooden...
  2. Merlin-PT

    The Zishan dsd's corner

    Mouser is an official sales channel for Muses as you can see from NJR site: https://www.njr.com/MUSES/series/MUSES02.html The Muses you bought here are genuine for sure. The ones you got from Aliexpress can be fake. There are a lot of remarked (fake) opamps in Ali. If you want to be sure it's...
  3. Merlin-PT

    The Zishan dsd's corner

    Please keep us posted about your modifications and progress. :) Thanks!
  4. Merlin-PT

    The Zishan dsd's corner

    I don't know were to but a SPDIF cable for zishan, I made my spdif cable. Do you have other equipment with SPDIF in where you want to connect the zishan? I looked at your photos and the quality doesn't allow to see any problem, maybe there is nothing to be seen, I can't tell. Sometimes there...
  5. Merlin-PT

    The Zishan dsd's corner

    That small part that came loose is the reset button. You can solder it back, but if you can't solder it, it's not needed, it's a push button that closes the circuit only when pressed/pushed. The player will work without this button exactly the same, the only difference being you can't press it...
  6. Merlin-PT

    The Zishan dsd's corner

    I already wasn't going to buy an ak4499 portable DAP before this zishan came out, my decision was about price, ~200eur is too expensive for me for a space, battery and budget circuit compromises. An expensive high end ak4499 DAP no budget limit design will also have space compromises and those...
  7. Merlin-PT

    The Zishan dsd's corner

    I'm not going to buy this, so I contributed the way I could. Previous post is an educated guess, AK4499 is a current output DAC, the datasheet uses a I-V (current to voltage) conversion circuit (4xdual opamps), followed by a passive LPF (some resistors and smd caps). Seller also says zishan uses...
  8. Merlin-PT

    The Zishan dsd's corner

    We don't know what is the Zishan DSDs ak4499 2.5mm impedance nor if it has gain (sound volume). I looked at ak4499 datasheet pictures (didn't read any of it) and they use a I-V conversion circuit in the datasheet, followed by a passive LPF. I can't guess what zishan did from the posted photo...
  9. Merlin-PT

    The Zishan dsd's corner

    I find it hard to believe that they (Sanling M5s) made a dual DAC and use only one dac in SE output to hold for a higher model, maybe they did it for the almost double battery life. They already had both dacs inside, they could use both for SE if they wanted, that would be the easy decision. I...
  10. Merlin-PT

    The Zishan dsd's corner

    From the top of my head, I remember measuring 2.5V DC at the legs of each one of the four 100uF DC blocking capacitors. This 2.5V DC is at the ak4497 output by design and in datasheet they block it with those capacitors. I didn't measure this part and my understanding is limited so I could be...
  11. Merlin-PT

    The Zishan dsd's corner

    Yes, that's it. https://www.head-fi.org/threads/the-zishan-dsds-corner.826185/page-160#post-15025178 I didn't change that part of the circuit as I use 300-400-600 ohms earbuds with the DSD.
  12. Merlin-PT

    DIY Earbuds

    400ohm are also my favorites, I've even opened a few holes (partial removing the driver tuning paper) for extra detail. (Also using a plastic mx500 shell). I want another pair of 400ohm, can anyone tell what's better with theses drivers, metal mesh grills or mx500 plastic mesh grills? I bought...
  13. Merlin-PT

    The Zishan dsd's corner

    A separated circuit could be used to connect only one dac in stereo mode, but I don't see the reason why they would use only 1 DAC on SE output... could you point me to the post were they explain that? There's no difference in sound quality in SE from 1 dac to 2 dacs ? From marketing point of...
  14. Merlin-PT

    The Zishan dsd's corner

    To implement mono mode in both dacs, this is programed by software but also physically implemented in the PCB circuit and that can't be changed from mono to stereo afterward, you would need a different wired for 1 dac stereo, this means they always need to use both DACs in mono for balanced and...
  15. Merlin-PT

    The Zishan dsd's corner

    Someone posted the last FW version for download in player.ru "Zishan DSD" thread (1rst page). There are 2 separated files, from the files names, I read one is for "Zishan DSD" and the other for the 2x ak4497 (dual dac) HW version. I've read in the thread the volume has 100 steps now. I didn't...
  16. Merlin-PT

    New- Zishan Z1 DSD player thread

    lme49720ha is also my favorite in Z1, but the legs are thick and get stuck in a new socket. Maybe your Z1 socket got loosen with use, it happen to one of my zishan sockets and I replaced it. It's stuck here (in new socket), can't remove it, so I insert this socket on top of the PCB socket:
  17. Merlin-PT

    The Zishan dsd's corner

    Maybe you need to replace the stock 2x op275 with something that gives more bass. I have and like 2x AD8066 that Ivan recommended me, they give me the needed bass. I also like the sound of genuine op275 that I bought for other daps, but I dont't like them here. From what I read from others...
  18. Merlin-PT

    The Zishan dsd's corner

    Yes, I had looked to that photo you posted and couldn't see any.
  19. Merlin-PT

    The Zishan dsd's corner

    I think aliexpress used the word professional on the ak4497 name, but not on the others, so the pro comes from there. I agree that the PRO label says nothing about the model, so I use the DAC to identify the models and "ak4497 upgraded" for the upgraded version. AK4497 has 22ohm output...
  20. Merlin-PT

    The Zishan dsd's corner

    I think you have the "Zishan DSD PRO", they call the ak4497 version PRO version. AFAIK you can't buy zishan box, you can buy the same size box, but they don't have any openings, you would have to cut those. If you mean to buy a protective case, I don't know. I like to buy my opamps from official...
  21. Merlin-PT

    The Zishan dsd's corner

    See some youtube videos to evaluate the difficulty in opening the box. If you want to change opamps in a cheaper and easy to open dap, I also like "Zishan Z2 ak4490" or "Z3 ak4493".
  22. Merlin-PT

    The Zishan dsd's corner

    I think so, but I enjoy opening everything. It's fun tinkering and to try to get a better sound, but I don't know the effect of only changing the socket opamp here, I changed a lot more. Changing opamp, you can try to tune the sound to your liking when you buy and try several different opamps...
  23. Merlin-PT

    The Zishan dsd's corner

    -> Howto open the BOX (when you have a new opamp to put inside): Power off, remove the 4 screws each side, remove one silicone or plastic spacer inside (I think its located at bottom). If you need, take photos, you'll have to put it back, exactly like it was. Now you need to place the screen...
  24. Merlin-PT

    The Zishan dsd's corner

    You need to tell us what DAC you have, because there are different HW versions, with different layout, depending on the DAC used.
  25. Merlin-PT

    The Zishan dsd's corner

    @DrSteinein What version you have, ak4497 ?
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