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DX220 A new view to your music. * Latest Firmware: 1.15.233 Local * Link for User Guide 1st Page. AMP9 Now available! And DC01.

Discussion in 'Portable Source Gear' started by Paul - iBasso, Jan 23, 2019.
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  1. LeMoviedave
    So, what is this upgrade. And what is the effect on the sound?
  2. duyanh43
    I think AMP8 3.5 PRO is mostly sold in China because somehow many Chinese users are using 3.5 balanced, basically as seen on Hifiman DAP. I don't think you can plug those 3.5 SE into this AMP.
  3. icefalkon
    Just got a set...lets see how they do with my IT04's...
    ExpatinJapan likes this.
  4. nanaholic
    A 3.5mm Pro balanced socket is recessed and is supposedly designated with a red outer plastic ring for easy identification, so you cannot plug in a SE 3.5mm plug into it as a normal SE 3.5mm plug will not be long enough to be pushed in. On the other hand, the 3.5mm Pro plug can be plugged into a SE 3.5mm socket, as the R- and L- pins are equivalent to the GND pins of a 3 pole TRS SE plug or the GND and MIC pin of a 4 pole TRRS mic headphone.

    It's a stupid standard IMO, because unlike the 4.4mm standard which is designed specially for audio use, the 3.5mm Pro is hardly professional as it is trying to claim - anyone with some electronic component knowledge knows they are just recycling a bunch of 4 pole TRRS jacks and plugs components that are left over from smartphones orders which are ditching them thus these parts could be have for cheap. There's a reason why they aren't pushing this outside of China, nor should be something the audio community around the globe should embrace either IMO.
    Last edited: Jul 14, 2019
  5. jmills8
    Cowon had that 3.5 balanced.
  6. nanaholic
    Technically Sony invented a similar pin layout first with their "separate ground" connection in the ZX2, and it wasn't a true balance connection as there was no negative pull in the amp design, rather the socket just have two separate GND pins for the left and right channel instead of sharing a single common GND pin. Hifiman and Cowon copied this as well but neither are true balance, which is why you can plug in a 3 pole TRS SE plug into these sockets safely.

    The 3.5mm Pro is actually for balance usage as it aims to replace 2.5mm and 4.4mm which are used in amp design which does have a negative pull, thus they needed to have the recess socket to prevent a SE TRS plug to be inserted or else the amp will be short circuited by the GND pins on a TRS plug.
    Last edited: Jul 14, 2019
  7. CobraMan
    This is about what I am getting out of mine as well in Mango Mode with mid gain and volume at 66 (Sony MDR-EX650 T/32 Ohm), occasionally bumped up to High gain for those songs recorded at a lower level. Like you, I am fine with the battery life - especially with the sublime sound quality!!!

    ehjie likes this.
  8. cleg
    first of all, it's a matter of accents for me. AMP1-2 is more focused on microdetalisation, while AMP9 isn't. it's also detailed of course, but it doesn't try to highlight that aspect of the presentation

    as a side note, I don't quite understand, why everyone cares so much about the detalisation. of course, it has to be good, but almost all modern DAPs are more or less in this aspect, but I'd happily trade a bit of microdetalisation for better treble layering or proper weight on mids. IMHO of curse
  9. Extrasensory
    Anyone uses DC01 with Samsung Galaxy S9/S10? Do you have any problems using?

    I saw this notice "So far, we found that the DC01 has compatibility issues with the Samsung S9 and S10 smartphones. It works flawlessly with other Android smartphones."
  10. ehjie
    Strange, really. in the morning there was a couple, this 1's blurred, but the pro looks like this...

    ExpatinJapan likes this.
  11. nanaholic
    The explanation for 3.5mm Pro is only available in Simplified Chinese, so you won't find much information in English. But here are the pictures from the inital announcement:


    Showing the extended red plastic ring of the plug that is 5mm in diamter and 3.5mm long to go into the recessed socket.


    A very dishonest picture showing the supposed size advantage over 4.4mm socket.
    Anyway whom has seen an actual 4.4mm socket should know the most outside protection ring is NOT part of the 4.4mm socket standard and is not a requirement. The size advantage is actually almost non-existent.


    An actual 3.5mm Pro socket. Very cheap looking and doesn't hold a candle to the two contact point per pin of a proper 4.4mm Pentaconn, it's really all about reusing existing 3.5mm TRRS tooling and keeping cost down, rather than because it is actually good for the end user or getting further improvements.

    The 3.5mm Pro standard is useless as it is not really much better than the already more provalent 2.5mm balance standard and is technically inferior to the better designed 4.4mm standard, it just further fractures the balance connection standard. Stay away from it I say and don't give it any more market exposure.
    Last edited: Jul 14, 2019
    fuhransahis and behemothkat like this.
  12. ehjie
    Sublime it is !
    Let's just enjoy the Music...

    Cheers to you, too
  13. ehjie

    These details exist on all frequencies.
    Why (i myself) insist / chase on those details ? That's part of my entertainment, for me that's how I perceive to be close to the actual venue of that state of performance captured in the recording.
    A good performance isn't perfect. somebody coughed, captured. The drummer hailed to the guitarist to get ready for the riff, to the vocalist for brace for the opening notes, captured.

    Of course, i most truly respect your preference, weight on mids & the high freq. layering to complete a good listening experience...
    cleg likes this.
  14. twister6 Contributor
    Seems that most of the people who have issues with DC01 and S9/S10 have phones with Exynos processor and corresponding chipset. Otherwise, if your S9/S10 uses Snapdragon processor, there are no issues. If I'm not mistaken, all US Galaxy phones, at least on Verizon, use Snapdragon. I'm using Verizon S9 w/DC01 without a problem.
  15. Gww1
    I've just updated the Tidal app on my DX220 and it seems that downloaded MQA masters are now fully unfolding when playing!
    Lurker0, behemothkat and bahamot like this.
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