Oh Ok, so it doesn't work then.. I thought it was possible. Thanks for the reply.

foshow said:

  Hey guys, has anyone tried using the USB OTG of this player to connect to a dedicated portable amp and does it work?

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nc8000 said:

OTG is for connecting a USB storage device. An external amp you connect via line out

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There are certain Amps (with built in DAC's) which take a digital stream from the OTG connection of a DAP. I think that's what he is asking.

frankrondaniel said:

Just got a new Samsung OEM battery, made in Korea. Swapped out the stock Pisen battery and what a surprise! Noticed an immediate difference (using IE800's btw). The Pisen sounded bass-heavy and muddy compared to the Samsung. The sound opened up with the Samsung - maybe almost too bright, but that may have been simply due to the contrast with the Pisen. I want to play with this some more and also do some comparisons with the Anker batteries that I have as well. I was very skeptical of any effect of different batteries on SQ before trying this, but the difference was more than subtle. Who would've guessed!

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On batteries, for me is important to use a quality battery. After "erroneously" received an unbranded and cheap battery, the sound of the DAP was downright bad. I'd rather not even talk about the autonomy. I finally got a real Samsung battery with the cell manufactured in Korea and assembled in China, the sound is comparable to the original if not slightly better. 
 
I have to listen more   

punit said:

   

There are certain Amps (with built in DAC's) which take a digital stream from the OTG connection of a DAP. I think that's what he is asking.

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Yeah, I think that's what I meant to ask if that is possible to do and if anyone have tried it yet and did it work.. like for ex: connecting the DX90 with Apex Glacier through their USB OTG ports.

Does anyone have a different link to the japan made batteries , the one listed 4 pages ago is home crazy and is asking $50 for one battery .

I've been using the GR10 for about a year with my Rockboxed Clip Zip - The sound is transparent with an impressive soundstage considering that these are IEMs. I mostly listen to classical and jazz. If you like a lot of bass, the GR 10 might not be the best choice thought - but for my taste, the bass sound natural.
 
Quote:

bigsix said:

  Hi everyone,
 
I've been reading these forums for quite a while and decided to finally register and post. Thanks to all for the wonderful advice given in this very long but very helpful thread. I've purchased the DX90 and I'm delighted with it.
 
I have a question regarding an IEM pairing with the DX90. I have three on my short list:
 
1) Grado GR10
2) NuForce Primo 8
3) Westone W40
 
I'd like to purchase an IEM for wear while on the go with the DX90. My main headphones are currently the Grado RS-1i, and I love the Grado sound. I listen to about 80% classical music and 20% classic rock/folk/etc. My budget for this item is about US$500 or so, but I'd be willing to go a little higher for something truly earth-shattering.
 
I've always used over-ear headphones and I've never purchased an IEM, so this will be a new experience for me. Thanks in advance for your help! 

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frankrondaniel said:

Just got a new Samsung OEM battery, made in Korea. Swapped out the stock Pisen battery and what a surprise! Noticed an immediate difference (using IE800's btw). The Pisen sounded bass-heavy and muddy compared to the Samsung. The sound opened up with the Samsung - maybe almost too bright, but that may have been simply due to the contrast with the Pisen. I want to play with this some more and also do some comparisons with the Anker batteries that I have as well. I was very skeptical of any effect of different batteries on SQ before trying this, but the difference was more than subtle. Who would've guessed!

Click to expand...

I'm also listening to my IE800 tonight. I'm at a coffee shop getting some work done, My DX90 powered by Made in Korea Samsung is taking me to a awesome places right now. Man the IE800s are pretty sweet, incredible what can be done now with such a small form factor.

Yup,ie800 and dx90 is pretty sweet.I have to admit defeat by the way.I thought the whole battery thing was hype but after comparison with the anker 4400,pisen and a no name battery the difference is pretty obvious.With anker the sound is much more dynamic,fuller and detailed in comparison to pisen.The gold 3250 battery i got from ebay degraded the sound significantly.Let's hope the samsung battery i ordered is at least on par with anker.

I put my money where my mouth is and picked up two more Samsung made in Korea batteries today ($23/each, full retail at the official Samsung Store). So now I have three of these bad boys. Looks like I'll be enjoying my DX90 for years to come without worrying about batteries. 

m-13 said:

  I put my money where my mouth is and picked up two more Samsung made in Korea batteries today ($23/each, full retail at the official Samsung Store). So now I have three of these bad boys. Looks like I'll be enjoying my DX90 for years to come without worrying about batteries.

 

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Or at least until dx120 and ie8000 appear

Dx50's new firmware is just available.  Will dx90's come soon ?
 
http://www.ibasso.com/en/download/index.asp 

Some theorizing on why the battery can affect the sound....
Disregarding the fact that it does not make obvious sense (which is purely because we do not have the necessary data, or understanding), and looking at the results, what we are seeing is similar to what we would see by cleaning up and improving the power supply on an amplifier.  In that situation, it makes perfect sense, and we can easily accept why the sound is different/improved.  After all, if you have just spent the time and money on building a much better linear supply, with lots of current reserve, high grade capacitors, low noise rectifiers, and sweated all the details, wiring, low noise transformer, etc., you would expect to hear a difference in the SQ.
 
So how does this apply to changing one battery for another in a DAP?
Well, the common thing is that we are changing the power supply.  One speculation is that the protection circuit may be introducing noise into the 5V output.  As there are electronic circuits inline with the output, and able to monitor/control/disconnect the output in case of over current, shorts, etc..  So if there is an electronic circuit inline, and it is introducing noise, impressed onto the 5V output, or Grd, this will cause the DAP digital and analog circuits to waste power, handling the noise, or actually decoding/amplifying the noise, and filtering it out.  Remove the noise, and all of a sudden, the DAP is able to work without wasting power, doing error handling,  or wasting CPU cycles.  The result is more dynamics, detail, staging, bass, etc.  
 
The above came to mind, as I worked on a problem (many years ago) where telephone central office equipment was periodically locking up.  5 pairs of redundant processors would lock up, and after pulling everything apart, inspecting and finding nothing, it would start working normally again, until the next time it happened.  We had already changed the hardware more than once, so we had to look for another cause.  It turned out to be a noisy switching power supply.  The electrolytic filter capacitors had degraded, and was introducing a higher than normal ripple.  We found that about 0.2V of ripple on the 5V output could cause the processors to lock up.  And this is not theory, as we reproduced it in the lab.
 
Since the months we spent on that problem, my eyes were opened to how much impact a noisy supply could have, even though the voltage and current measured fine.  I am stretching to compare this battery situation as a similar situation, but it seems to make sense to me, and would explain how a "simple" battery can affect the SQ in such a drastic manner.  But of course, a battery is no longer just a chemical cell with two leads connected to it, and nothing else....they are much more complicated than that, nowadays.
 
So, that's my contribution to trying to put forward a theory that could explain what we are seeing.  As with all theories, they are just that until proven right or wrong.  But if you don't try to theorize, and trigger other thinking, then the vacuum never gets filled, so I've always believed that speculation is necessary.  Denying a fact that you are seeing because it does not make sense, is a dead end.  And I can say that from a background of spending decades doing troubleshooting on telephone central office switches.

What company? I used to be in telco as well before the big stock crash in 2001 was it? I was with Frontier Telephone at that point and they were subsequently purchased by Citizens Communications.

The whole battery logic makes sense and has made sense, also think about it with USB dacs the power from USB is not as good as a dedicated rechargeable cell.

With Nortel, in Canada.  From analog switching, to hybrid computer/mechanical, to digital systems.  Installation, Tech support, Customer Service.  So  I'm not leary of taking things apart, or trying to figure out how to make things work.  Been doing that all my work life.  Audio has been a longtime hobby, the only one that has lasted.  Now, in HK, the shift from home systems to portable systems makes sense, as there is not enough space.  My current home system is sitting unused, after moving to a smaller place.  But fortunately, mobile systems have gotten so good that it can make up for not having the home system.  And swapping batteries is a lot cheaper and easier than tweaking all the parts in a home system.

foshow said:

  Hey guys, has anyone tried using the USB OTG of this player to connect to a dedicated portable amp and does it work?

Click to expand...

 

nc8000 said:

OTG is for connecting a USB storage device. An external amp you connect via line out

Click to expand...

There are certain Amps (with built in DAC's) which take a digital stream from the OTG connection of a DAP. I think that's what he is asking.

 

Click to expand...

He is certainly asking about DX90, so in DX90's context USB OTG is only for storage. Doesn't matter if the amp supports digital audio via USB, it simply won't work with DX90.