Recent content by marbert
  1. marbert

    Xduoo Amplifiers

    I'm afraid the general problem is that xDuoo engineers don't want to strain with inexpensive models. They could provide a delay when turned on, add the relay, but no... Is it so difficult for xDuoo engineers? For example, recently, I measured the temperature of my MT-601 (attached the results...
  2. marbert

    Xduoo Amplifiers

    Hello Wiljen, I saw a photo of MT-601 circuit board in your review on audiofool.reviews, it is very similar to the fissure next with a tube connector (see the attached photo). It arose when you tried to replace the tube?
  3. marbert

    Xduoo Amplifiers

    Oh, sorry, one more question. Does your MT-601 have a strong click when you turn on? And what is the constant voltage at the headphones jack output? If you have measured. And is there any protection in MT-601?
  4. marbert

    Xduoo Amplifiers

    Ok, thank you.
  5. marbert

    Xduoo Amplifiers

    Thanks for the detailed answer. And what could you say about the sound of MT-601? Everywhere reviews only about MT-602 and extremely few reviews about 601 model. I am interested in can I hear "soft warm tube sound" in the MT-601? Many write that 602 model in this sense differs little from the...
  6. marbert

    Xduoo Amplifiers

    Hello, do you still like xDuoo MT-601 as an amplifier for Grado? During this time did you find any problems or minuses in MT-601?
  7. marbert

    Review by 'marbert' on item 'Nobsound NS-02E'

    Hello, maybe it will be someone interesting. This is my experience of easy modification the Nobsound NS-02E amplifier. When I first saw Nobsound NS-02E in 2016 I immediately liked it. The chinese goods in general very similar, but this baby is stand out on general background. I mean design. In...
    • marbert
    • Head Gear rating
  8. Nobsound NS-02E

    Nobsound NS-02E

    The default tube is 6N3, which can be easily replaced with 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396, ECC 42, 6H3N, 6H3II, ECF82, 6CC42.
    • marbert
    • Head Gear item
    • nobsound ns-02e nobsound ns-02e mod octal tube soviet tube
    • Reviews: 1
    • Category: Desktop Amps
  9. marbert

    Reply to review by 'marbert' on item 'XuanZu XZ-U303 / Nobsound NS-02E Headphone Amplifier'

    Join the question, also I would like to know how to get rid of distortion using low impedance headphones. I have a Grado SR80 (32 ohm). And why does the author write everywhere that he bought XuanZu XZ-U303 and that this is an analogue of Nobsound NS-02E, at the same time everywhere on the all...
    • marbert
    • Head Gear rating reply
  10. marbert

    Revival of aiwa, New DAP announced.

    Unfortunately, AIWA did not release this player, but it appeared under other names: 'AGPTEK H3' and 'iRULU F20' That is, it is a product of some no name Chinese factory (perhaps 'Aigo', if 'Aigo' produces anything at all) for third-party brands. In any case, the player looks very...
  11. marbert

    TOPPING NX1 Portable Headphone Amplifier Impressions Thread

    Try with another cable, I had extraneous sounds from the smartphone, if it was nearby. I replaced the Topping cable and the extraneous sounds went away. P.S. I bought Fiio L16, but you can try any other, the main thing is that it should be better than the Topping cable.
  12. marbert

    TOPPING NX1 Portable Headphone Amplifier Impressions Thread

    Hello, sharpi31. Since I'm not very knowledgeable in electronics, could you do a step-by-step instruction on your Topping NX1s modification? Mark with arrows on the photo, what exactly needs to be changed? Thank you.
  13. marbert

    Obscure Chinese DAPs

    For classical and jazz music - Nintaus X10 (second revision) is an excellent option. It's sound can be described as "soft", "analog" (tube). But it is slightly more expensive ($55-65).
  14. marbert

    Obscure Chinese DAPs

    This is not a fake, the electronics segment of Philips has long been bought by the Chinese, Philips has long been not Dutch, alas. But this is the official Philips. Otherwise, the price would for fake be much lower ))
  15. marbert

    Obscure Chinese DAPs

    They do not write X10_S, early they wrote simply "Upgrade Version", but now probably the first version is no more in selling, but it is better to ask the seller. I bought in Penon Audio, but there are offers cheaper, just type in search Nintaus X10 - https://goo.gl/1Rzn7y P.S. The complete kit...
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