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  1. johnchpark

    ThieAudio Signature Series Tribrid IEMs

    Sorry, I joined the conversation late, so I must've missed that. Anyhow, going through this whole debacle, all I can see is that Linsoul customer rep followed its standard procedure and was pretty cool about it while @Bret Halford was inflammatory from start to finish. I understand frustration...
  2. johnchpark

    ThieAudio Signature Series Tribrid IEMs

    While not all customers are bad people, there are still customers who try to scam their way into free products or replacements - and not just in the audio market, but for any commodity. This is especially true towards Chinese sellers. This is partly a fault on the earlier Chinese markets, where...
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  4. johnchpark

    Home-Made IEMs

    Thanks a lot! Watched the tutorial and was able to get my shells done with Mixer! Even got around to trying a CIEM eartip mold. Now just have to find a 3D printer to test them
  5. Moondrop Alice

    Moondrop Alice

  6. johnchpark

    Review by 'johnchpark' on item 'GoldPlanar GL-AMT16'

    Disclaimer: I am an IEM engineer and am heavily involved in the industry. I have been involved in the tuning and engineering of numerous IEM’s from numerous different popular IEM brands. I did not purchase the GL-AMT16, and tested it as a distributor sample from the factory. I do not profit from...
  7. GoldPlanar GL-AMT16

    GoldPlanar GL-AMT16

  8. johnchpark

    Home-Made IEMs

    Hi, so i tried wiring and testing some of my drivers, and my fullrange drivers (ED29689, ED268905, DWFK31785) all came out looking like this. Doesn't look like the data sheets. Just wired directly + to +, - to -. 15mm Tube. My other woofers and tweeters graph correctly. Is there something I'm...
  9. johnchpark

    Home-Made IEMs

    Will there be any issues of using a lower voltage capacitor (6-10V) in an IEM if the source output is higher (up to 12Vrms)?
  10. johnchpark

    Home-Made IEMs

    I'm starting out and trying to get a set of capacitors & resistors of wide values. I found these two on Alieexpress, but I was wondering if anyone had better suggestions/sources. I'm a little concerned with the tantalum capacitor Im linking below, because I know they have +/- polarity, so not...
  11. johnchpark

    Home-Made IEMs

    Hi, just a quick question. For IEM's, about how much should the voltage be for the capacitors? And for ceramic capacitors, are capacitance loss not an issue for IEM's? Thanks!
  12. johnchpark

    Shanling UP4 & UP2 - Bluetooth 5.0 DAC/AMP with ES9218P, balanced output, supporting LDAC, HWA LHDC, aptX HD, aptX Low Latency, aptX and AAC.

    Has anyone figured out how to update the Shanling UP4 to v1.2.3 to use with the mobile App? I tried following the instructions, but my UP4 doesn't seem to behave the way the instructions are saying.
  13. johnchpark

    Shanling UP4 & UP2 - Bluetooth 5.0 DAC/AMP with ES9218P, balanced output, supporting LDAC, HWA LHDC, aptX HD, aptX Low Latency, aptX and AAC.

    I just learned my lesson and always turn on the device, and start the music BEFORE i plug in my iem.
  14. johnchpark

    Shanling UP4 & UP2 - Bluetooth 5.0 DAC/AMP with ES9218P, balanced output, supporting LDAC, HWA LHDC, aptX HD, aptX Low Latency, aptX and AAC.

    I'm using mostly IEM's for the UP4, and it get's a bit too loud. An option to disable/enable the voice in the APP would be a great idea. Also. the pop. God. I was enjoying the UP4 so much and then they happened, and it just ruined all the joy. Couldn't listen for the rest of the day because my...
  15. johnchpark

    ThieAudio Voyager 14

    $1000 is a real steal for it! Just the components alone would have been worth it. But it sounds great too so worth it in all sense!
  16. johnchpark

    ThieAudio Voyager 14

    To me it made a difference so i only use 2-pin, which was how the review was also written
  17. johnchpark

    Tansio Mirai Impressions Thread

    thanks. Sounds like a smooth tuning rather than super energetic or reference. Can you describe the overall tuning? harmon? Df? V? W? Etc.. So Zodiac is up in the range of brand name totl’s?
  18. johnchpark

    Tansio Mirai Impressions Thread

    So it seems like the overall sense is: Lush mids, present treble, but not too sparkly? The graph has the mid-treble rise start a little higher than usual, maybe around 1.5k. Was wondering what that does to the overall signature. How is the technicalities, like resolution and imaging? Debating...
  19. johnchpark

    Obscure Chinese DAPs

    I haven't bothered to open the back up yet. Here is the reply from Acmee (they also released a new update yesterday, which fixed the missing files issue). "Hello, thank you for your love of MF01. 1. MF01 back-stage ear discharge circuit uses Class A circuit, even if it does not play, it is the...
  20. johnchpark

    FEARLESS Audio IEM's Discussion/Impressions

    On my S8F, i also heard “driver flex-like” crinkle. Initially i thought it weird because it’s all BA. It might be just pressure building up in my ears, especially since Fearless shells are hollow. A8, S8F, and Roland all fit super deep and tightly in my ear (i use a wide tip that allows me to...
  21. johnchpark

    FEARLESS Audio IEM's Discussion/Impressions

    sounds good. Hope monsoon isn't too bad there in Cebu. Placed my order for the Roland too
  22. johnchpark

    FEARLESS Audio IEM's Discussion/Impressions

    Btw, BGVP will also release an EST model in the coming weeks. Moondrop Solis will also come up on Linsoul soon too.
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