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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. ThomasHK
    I have a suspicion the audio routing is different between Mango OS and Mango app.

    I use the dx220 primarily with Hugo 2 feeding it over optical. Similar differences heard from the HP out between the two Mangos are also present using external DAC.

    Reasons why I think audio routing is different

    (1) no mqa unfolding on Mango OS
    (2) Mango OS allows you to put EQ before the optical out. Android app does not. This actually means the output over optical is NOT bit perfect.

    I'm wondering if there's some always present sample rate conversion on the Mango OS implementation.

    Hoping iBasso can clarify. For lossless file formats, the difference cannot be explained by supposed timing or supposed software algorithm differences some claim here, I don't buy that for a second. Timing is inherent in the bit stream and can only be modified if resampled before the DAC stage.
    Christoph likes this.
  2. ThomasHK
    Amp 7... damn! Soundstage for days. Smoother in the high mids/highs than amp1mk2. Bass tight but not overdone with improved layering. Loving it.
    KLJ1992, Layman1 and ExpatinJapan like this.
  3. KLJ1992
    Same, picked up a used amp7 myself over the weekend. Likin what I've heard so far. Perfect sweet spot between the power of 8 and the sound of 9
  4. flarex3
    AMP8's output voltage is 6.2 Volts. Can we use the V^2/ R formula to calculate the output power at any impedance ? i.e. 2957 mW at 13 ohms
  5. jamato8 Contributor
    It will get you in the ballpark but it won't be that high. It would require a constant current but the current, I am sure, will not allow for almost 3 watts, as the AMP8 can't supply that much current.
  6. MilesR
    Late to t
    Late to the party but
    +1 for the AMP8-EX!
  7. aaf evo
    sign ups have been closed for a month or so now.
    MilesR likes this.
  8. HK_sends
    Yeah, but don't be surprised when, with the notice of EX's shipping to customers, you get a personal message formally offering you the chance to design and/or tweak some DAP/amp topologies...:smiling_imp::smiling_imp::wink:

    -HK sends
    Last edited: Dec 11, 2019
  9. ThomasHK
    @Paul - iBasso

    Now with the amp7 in my possession as well, I've been doing more listening back and forth between Mango OS and Android mode.
    The best way I can describe the difference is that the middle of the soundstage is pushed further back in the mix in Android mode, making the center image less focused and more emphasis on the sides. Also, more bass emphasis in Mango OS mode. Overall Mango OS mode sounds more like other sources, Android mode sounds... off.

    One theory I have is: the ESS DACs are configured incorrectly on boot up in Android mode and some of the L and R channels are actually flipped and cancelling, making the bass response lower and removing some of the middle (similar to how you can change the soundstage in a Mid/Side mix).
  10. Paul - iBasso

    -EQ on or off doesn't affect the bit perfect output.

    The Mango OS is based on Linux OS. Android and Linux are two different OSs. There are lot of differences between the Android Mango Player and the Mango OS.

    When using Android OS, there are many APPS working on the background. The CPU has more burdens/tasks. With Mango OS, the CPU is dedicated for the Mango, so the sound is can be different and can be better.
    iBasso Stay updated on iBasso at their sponsor page on Head-Fi.
    MattSPL, fokta and Whitigir like this.
  11. Johnny Woody
    Is there any chance to add mqa unfold ability to mango os?
  12. Paul - iBasso
    The MQA is software and it runs in the Android system. We work with MQA and have our players certified with them so it will work in Android but the OS of Mango is different so it can't work with it and no apps are used with Mango.
    iBasso Stay updated on iBasso at their sponsor page on Head-Fi.
    Dobrescu George likes this.
  13. duyanh43
    Any chances that there will be a DAC/Amp iBasso device that make use of the existing amp modules *cough* *cough* Q5 xD
  14. Paul - iBasso
    The ESS dacs are working correctly. What you are hearing is the difference of Mango and Android and the ability of the AMP7.
    iBasso Stay updated on iBasso at their sponsor page on Head-Fi.
    ThomasHK likes this.
  15. flarex3
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