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May 16, 2014 at 5:27 PM Post #5,042 of 14,084
I received my DX90 a few days ago and have spent a lot of time learning my way around and loading music. I really like the sound and definitely like the UI over my returned AK100, up until today. Here is what is happening. While listening to some quite music (acoustic Neil Young, Patricia Barber, etc.) with most at 192K. After a few minutes are careful listening, I begin to hear subtle pops and clicks on the tracks. Seems somewhat intermittent, but it is definitely there. Anyone else have this? Thoughts on how to resolve it?
 
May 16, 2014 at 5:39 PM Post #5,043 of 14,084
davidw said:
  I received my DX90 a few days ago and have spent a lot of time learning my way around and loading music. I really like the sound and definitely like the UI over my returned AK100, up until today. Here is what is happening. While listening to some quite music (acoustic Neil Young, Patricia Barber, etc.) with most at 192K. After a few minutes are careful listening, I begin to hear subtle pops and clicks on the tracks. Seems somewhat intermittent, but it is definitely there. Anyone else have this? Thoughts on how to resolve it?
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I don't know what is causing this, but can you try listening whilst your DX90 is plugged into a power source, and see if the issue is still present?
 
May 16, 2014 at 6:12 PM Post #5,044 of 14,084
mython said:
   
I don't know what is causing this, but can you try listening whilst your DX90 is plugged into a power source, and see if the issue is still present?
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I am not sure what causes this and haven't experienced it but I emailed iBasso in the past and it is being corrected. 
 
May 16, 2014 at 6:18 PM Post #5,045 of 14,084
My guess is that it may be either a power management or data buffering issue. Whether firmware tweaking would be sufficient to address that (or whatever else it might be), is anyone's guess.
 
I'm still likely to buy a DX90, but I would like to know that this issue has been successfully dealt with before I do (as well as the random truncation of the first 2, or last 2, seconds of each track, which has been reported by many users).
 
 
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May 16, 2014 at 6:58 PM Post #5,046 of 14,084
musicheaven said:
Good one at least now you experienced firmware upgrade on the DX90 for the first time.
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It is quite straight forward imo..
 
One thing I noted is that you can't use a USB 3.0 port on a Window 7 64bit OS - it has to be USB 2.0 I think!
 
May 16, 2014 at 7:17 PM Post #5,047 of 14,084
philiptw said:
It is quite straight forward imo..

One thing I noted is that you can't use a USB 3.0 port on a Window 7 64bit OS - it has to be USB 2.0 I think!
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I would not know because my PC setup has frontal hybrid USB ports, you can use it in 2.0 or 3.0 configuration. There was a driver I needed to launch after the Op system upgrade. that drives the USB function, fancy board I use in my build. I am currently using Windows 8.1 64-bit so the DAC won't help me much until they release the 64 bit version.
 
May 16, 2014 at 7:37 PM Post #5,048 of 14,084
musicheaven said:
I would not know because my PC setup has frontal hybrid USB ports, you can use it in 2.0 or 3.0 configuration. There was a driver I needed to launch after the Op system upgrade. that drives the USB function, fancy board I use in my build. I am currently using Windows 8.1 64-bit so the DAC won't help me much until they release the 64 bit version.
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You'd think they'd design a 64-bit driver in tandem. I'll bug them about it regardless. Hopefully they actually fix the issue, unlike Astell & Kern with the Ak120.
 
Kojaku
 
May 16, 2014 at 7:39 PM Post #5,050 of 14,084
shipped back my DX50 a couple weeks ago because of a defective forward button.
the dx90 is under away should receive it on sunday or monday.
 
going to pair it with my 1964 ears v3.
i was wondering what gain setting do you guys use for IEM's?
Dx90 SQ significant better then DX50?
 
May 16, 2014 at 8:03 PM Post #5,052 of 14,084
davidw said:
  I received my DX90 a few days ago and have spent a lot of time learning my way around and loading music. I really like the sound and definitely like the UI over my returned AK100, up until today. Here is what is happening. While listening to some quite music (acoustic Neil Young, Patricia Barber, etc.) with most at 192K. After a few minutes are careful listening, I begin to hear subtle pops and clicks on the tracks. Seems somewhat intermittent, but it is definitely there. Anyone else have this? Thoughts on how to resolve it?
Click to expand...

The DX50 does this to. It's a known problem and too bad it's not fixed yet. On the DX50 it does it when your file is on the SD card but not when on internal memory. Seems like an issue reading the card with the 192K files.
Scott
 
May 16, 2014 at 8:20 PM Post #5,053 of 14,084
flyinmn said:
  The DX50 does this to. It's a known problem and too bad it's not fixed yet. On the DX50 it does it when your file is on the SD card but not when on internal memory. Seems like an issue reading the card with the 192K files.
Scott
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So, I'm thinking it may be that the player is accessing the SD card in bursts, so the slight sound may be due to increased power-draw during these access moments... but that would be a normal DAP operation, regardless of maker or model, so it rather makes me wonder if it may be a shortcoming of the power supply design, in the sense that the DX50/90 power supply may be struggling to quietly supply sufficient current during certain operations without inducing increased noise in the circuit.
 
I support the use of a user-swappable battery, but I still acknowledge that using a relatively small, low-voltage 3.7v cell may involve potential compromises when being used to feed a high-performance audio circuit.
 
May 16, 2014 at 8:25 PM Post #5,054 of 14,084
If low voltage was a problem, then the Hugo wouldn't be as good as it is. And, it isn't the circuit or the voltage, if the system is designed for a specified voltage, whether it be 700 volts as in my home preamp or 2 volts as in part of my home dac system I built. I got an email form iBasso that the popping has been remedied. 
 
May 16, 2014 at 8:30 PM Post #5,055 of 14,084
jamato8 said:
  If low voltage was a problem, then the Hugo wouldn't be as good as it is. And, it isn't the circuit or the voltage, if the system is designed for a specified voltage, whether it be 700 volts as in my home preamp or 2 volts as in part of my home dac system I built. I got an email form iBasso that the popping has been remedied. 
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Well, I guess we'll just have to wait and see, won't we?
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Perhaps they have changed the microSDcard access and data-buffering policy in the firmware, but iBasso saying it's fixed doesn't prove it actually has been fixed. I must say, I'm disappointed to hear of this issue (and the random 2-second truncation of certain tracks), so long after the DX50's release.
 
 
And, with no disrespect to iBasso (I actually like iBasso), and no disrespect to you, either, comparing it to the Hugo is... laughable. The Hugo is a very advanced and highly customised circuit design, and the cells are much more substantial than the one employed in the DX50/90, too.
 
 
I want the DX90 to perform well, as I applaud iBasso for bringing this level of SQ to this affordable price-point, instead of greedily price-gouging like iRiver. I really hope they can walk-their-talk and genuinely put these issues to bed. If they can, I'll happily join the DX90 owners club.
 
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