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The New iRiver AK100: A High-End DAP - Page 437

post #6541 of 8516
Quote:
Originally Posted by musicheaven View Post

I have SE535 and have no issues with muddy sound but I don't use the stock cable, custom silver cable. You can go for better iems with better drivers and amount but it sure will set you up in price. If you still want to keep your SE535 that's the next step to improving them else get your cash out and spend more on say seinheiser IE800 that apparently are perfect stock AK100 buddy, not sure about the RWAK100 though maybe someone here can comment. If you read prior posts many hifi-head experience listeners have mentioned their gears.

I have a null-audio lune series cable with my se535 and I am looking to sell it....I have just ordered a fitear F111...hopefully I will receive it soon :-)....I will also look for a replacement cable if all goes well with the F111.
post #6542 of 8516
Quote:
Originally Posted by pat9486 View Post

I have a null-audio lune series cable with my se535 and I am looking to sell it....I have just ordered a fitear F111...hopefully I will receive it soon :-)....I will also look for a replacement cable if all goes well with the F111.

I am selling both as a combo...
post #6543 of 8516
Thread Starter 
Quote:
Originally Posted by DICOM View Post

I like the ALO International. I originally bought the Rx-MK3, but the noise floor was too high (i.e., too much hiss). No such problem with the International. Also, the International is slightly smaller than the Rx-MK3 and as such "fits" the AK100 better.

The AK100 has a high output impedance of 22ohms, oh no!!

How about fixing that by pairing it with the ALO International, oh noes, output impedance of 21ohms!

 

deadhorse.gif

 

Lets try the Rx-MK3, ah thats better because no one seems to know its output impedance, or the National....or Continental...does ALO? Well I did email them the International test results, is it on their website, nup. why? well I think we can have a few guesses why ;)

 

The Intruder or SR-71B seem like better choices. Especially for IEMs.

post #6544 of 8516
Quote:
Originally Posted by musicheaven View Post

Looking for sq in different dac arrangements, the dual is always preferred over single so I would expect the following order to be going from best to worse (amp out of the equation):
Dual WM8741
Dual WM8740
Single WM8741
Single WM8740

I am only talking about using the base functionality, the 8741 has more functions which could change the balance even used in single mode.

As many observers have found, the implementation is also extremely important, for example an implementer can use external filtering instead of the internal dac filtering function.

As far as battery life and portability, the 8740 in single and dual is the preferred DAC.

Knowing the power requirement of those two ICs the only way to extend battery life is with a more powerful battery which will invariably make the portable bigger and heavier, unless somehow battery technology changes.

 

YMMV, but I find the single WM8741 running the 'minimal phase' digital filter (MPDF) option (modded AK100) to be superior to the stock AK120's dual WM8740 implementation.  WM8741 with MPDF sounds more natural (a lot of that is due to the lack of pre-ringing that the standard linear phase filter that the WM8740 uses), and has more top-end extension - without any sibilance.  It doesn't try to smooth over the detail, but doesn't seem to exaggerate it either.  Of course the portable amp and headphones you use also come into the equation, as do your listening preferences.

 

As far as battery life, playing the modded AK100 with WM8741 with 24/192 albums only, I was able to still get 8 hours.  I'm sure mixing in lower bit rate high-res and rebook would cut processing power down and increase the life more.  I expect the play time to be about the same for a modded dual WM8741 version of the AK120, as it has a higher mAh battery.  We'll see...

 

Cheers!

 

Vinnie

post #6545 of 8516
Thread Starter 

@Vinnie, I like the idea of the S mod, but it is a pity it cannot exist in conjunction with a functioning headphone out also for theose `lighter` days.

 

_________________________________________________________

 

it is interesting that the two filters you mention sound remarkably like the 2 choices of filter on the Fostex hp_p1.


Edited by ExpatinJapan - 7/7/13 at 6:49pm
post #6546 of 8516
Quote:
Originally Posted by ExpatinJapan View Post

@Vinnie, I like the idea of the S mod, but it is a pity it cannot exist in conjunction with a functioning headphone out also for theose `lighter` days.

Seems having to stick an amplifier on defeats the idea of a high end portable DAP.

post #6547 of 8516
Thread Starter 
Quote:
Originally Posted by Saraguie View Post

Seems having to stick an amplifier on defeats the idea of a high end portable DAP.

+1.

 

I can understand idevice needing an upgrade to a stack.

But If i am already paying for a device that advertises as a stand alone be all, i really dont want to pay anymore to get it functioning up to standard.

 

I can understanding modding a Honda for instance, but not a BMW.

post #6548 of 8516

Hi ExpatinJapn,

 

I hear you - it is a pity.  Believe me, if I could do it, I'd love it offer it both ways with the WM8741.  

 

But...

 

 

1) Unfortunately, without a custom firmware update that is designed for the WM8741 and allows it to both run in software mode AND use its minimal phase digital filter, this is not possible.

2) What is also cool about the WM8741 is that is can do native DSD playback (unlike the WM8740).  Again, it requires firmware to allow for this to work.  I highly doubt iRiver will make a custom firmware for the RWAK100-S - but it would be nice if someone wants to take on this project.  

I'd be happen to mod a unit at no cost to someone who wants to take a crack at both 1 and 2 above (Maybe Listrid wants to take this on??? wink.gif).  

So in the meantime, we make the best of the situation by dedicating the RWAK100-S modification to those who exclusively use it as a source component to feed an external headphone amplifier (required) with the best possible, true-line out signal.

All the best,

Vinnie

post #6549 of 8516
Thread Starter 

Thanks for your full and dignified reply Vinnie.

 

Interesting stuff.

post #6550 of 8516
There were some discussions in Japan and Hong Kong regarding WM8741 and DSD

http://blogs.yahoo.co.jp/kuroiwa32/28877187.html‎

http://blog.tcp-ip.or.jp/ar/m-syuuta/?itemid=643

http://homepage2.nifty.com/naisudac/WM8741_DAC/WM8741_DACV2.htm

http://www.hkepc.com/forum/viewthread.php?tid=1965267

http://www.photo100fun.com/viewthread.php?tid=26946&page=4

http://www.post76.com/x2/forum.php?mod=viewthread&tid=159441

http://www.twistedpearaudio.com/digital/opus.aspx

http://www.twistedpearaudio.com/docs/digital/opus_2.0_manual.pdf‎

One of us could get in touch with Listrid and explain what this is all about. There were some Linux gurus who might have worked on something similar before

http://mailman.alsa-project.org/pipermail/alsa-devel/2010-August/030029.html

http://git.opencores.org/?a=commit&p=linux&h=992bee401c06872175056bc5567cb3ebab098cb5
post #6551 of 8516
I am interested in the portable amp debate as I am just about to pair the ALO RK 3 B with the 100S
However I am having trouble getting it here in Australia and could change my order to the ALO international
Undecided Help!
post #6552 of 8516
Would be great if the Listrid would work with vinnie to make a custom firmware running on ak100s smily_headphones1.gif
post #6553 of 8516
Vinnie, Do you know where to look Listrid. forum.doctorhead.ru. I know that he worked with DSD in other projects. You can ask him. Good luck.
post #6554 of 8516
Quote:
Originally Posted by wladrus View Post

Vinnie, Do you know where to look Listrid. forum.doctorhead.ru. I know that he worked with DSD in other projects. You can ask him. Good luck.

http://forum.doctorhead.ru/index.php?showuser=10843

 

That's the link to his profile

post #6555 of 8516
Quick question?
Just received my RWAK 100S and plugged in for first time
Do I have to wait for it to finish charging before I can drag and drop files into it?
Can anyone send me a link to the manual I have found the zip version but cannot open it is there a PDF version instead
Cheers
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