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DX220 A new view to your music. * Latest Firmware: 1.13.202 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. edwardsean
    I went in and manually connected the 5th pole to the ground plane using pure silver wire scavenged from an old Whiplash TWAg cable. The sound actually became ever so slightly noisier.

    Using the 5th pole ground may be best for desktop AC amps with a true earth ground rather than DC applications. I've heard that the guys at Music Sanctuary had similar findings in testing modifications on DAPs.
    Last edited: Oct 21, 2019
    Ojisan and Whitigir like this.
  2. Whitigir
    Sony Walkmans actually do not have 5th pole connected
    Ojisan and edwardsean like this.
  3. chaiyuta
    Nice~ The charm of mod-by-self that is you can use your own specific parts picking. At the end, you will get an uniqueness AMP module. Among "Ojisan", you will be "Ojisan-est". :military_medal:
    Last edited: Oct 22, 2019
    Ojisan likes this.
  4. gordec
    Anyone using amp8 with HD800? I got the 4.4 stock Sennheiser cable today. It sounds ok driving the HD800. It's loud enough, but certain not even close to what a desktop amp can do for the HD800.
  5. Vitaly2017

    When I had dx208 at the time with hdv820+hd800s.
    It was a no brainer hdv820 just ate dx200 as an entree for super lol.

    To be honest hd800s is very hard to drive headphone you need a load amount of proper power and good synergy. They sounded best from hdv820 sorry .
  6. gordec
    Yeah. I wasn't surprised. I just felt it would sound a little better than what I heard.
  7. KLJ1992
    Folks with amp8+it04:

    Whats your vol. level+gain setting?

    I'm @ 50 with med gains?
  8. gordec
    From what I understand, dx220 uses a digital gain system. It's not analogue, so doesn't really matter. I tried it with my IEM and headphone, other than loudness level, everything sounds the same.
  9. Whitigir
    Actually analog attenuation is preferred rather than digital attenuations. With the new production IC, every brand name companies have already solved some of the digital attenuations problems. Still, no digital attenuations, and analog attenuations is a preferred implementations. You can look into Sony DMP-Z1 to understand more of why they keep on talking about the RK501 volume attenuators on it

    the trade off is that analog attenuations would increase the footprint of the device to be as large as the DMP, while digital attenuations can minimize the foot-print very well.

    theoretically speaking. It depends on your gears that you are pairing with, but most of the time, it is better to use low gain at higher volume for any digital attenuated system such as Ibasso dx220
    Last edited: Oct 22, 2019
    fokta likes this.
  10. gordec
    That's what I'm implying. Analogue gain is better.
    Vitaly2017 and Whitigir like this.
  11. CobraMan
    Well - there are pros and cons of each approach as most everyone is probably aware. A few of the key dislikes I have of analog volume control are 1) deterioration over time as the components wear or form oxidation layers or accumulation of dirt/dust/etc, 2) possible entry points for noise and interference into the circuitry, and 3) take up more physical space. For me the key advantage or benefit is the extra fine resolution of changes in volume you get with analog vs the typical digital control.

    Anyone else have pros and cons to share?

    Last edited: Oct 22, 2019
  12. Whitigir
    you are correct on those counts, and hence RK501 is pretty expensive for what it is....not only performances, quality, but also the longevity. The Volume knob on the DMP-Z1 is quiet unique as that Sony found out, the chassis that contains and shield the attenuators as ground points will also affect the so quality. They had gone through multiple set up with different aluminum and Brass enclosure.....finally to set-on the Copper Goldplated knobs, and the Stock Goldplated Brass from RK50
  13. jamato8 Contributor
    It does look pretty crazy. Nice. Who makes it? How is it better than a relay that puts just one resistor (high quality) in the signal path? That would be my question but it does look pretty fine.
  14. Whitigir
    Alps made it, and I guess you need to look around for more info on it. The RK50 is very well regarded for analog attenuators. It is $1000 per unit if you buy it for DIY purposes, and the wait time could be 1-3 months
  15. gordec
    I wonder if the new Max will drive HD800 to a satisfying level. Probably will introduce more hiss for sensitive IEMs. It's hard to do well at everything.
    Vitaly2017 likes this.
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