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Asus Xonar DG /DGX and it's performance, help and tips needed - Page 2

post #16 of 22

Another point:

When I tried my 18ohm Amperiors with the DG there was noticeable hiss through the amp, so I changed it to 'speakers' which bypasses the dedicated amp which solved the problem. So going below 32ohms on the DG is not recommended.

post #17 of 22

Interesting, when i listened on my IEM's on the DG 16 ohm i couldnt hear hiss, even at max volume.

Its always possible the Xonar DG has high ohm, maybe 10 ohm that was mentioned here.

I will have to check again with the iem's when i get home.

post #18 of 22

@ MadBull

Thank you and glad I could help.



I don't think the DG makes my Superluxes more true to their inherent nature.

Powered by the Fiio E10 the sound of the HD668B is noticeably more balanced and the treble significantly less grainy compared to the DG. Bass texture is also very good.

This fact probably convinced me the most the DG has a rather high output impedance, which in turn has some less good interactions with my headphones.

At any rate, without knowing for sure it's actual value and how it actually affects the sound, this is just a guess on my part.


On a general note re: HD668B I do not really agree with the "boomy bass, harsh treble" conclusions. The treble is indeed hyped on these headphones but with EQ that becomes a none issue.

The bass control and actual texture is very good. Even driven by onboard sound or the DG, the detail and impact of the bass notes are still very good.

Driven by the Fiio E10 and comparing them with Sennheisers HD580 (which are very well balanced and smooth sounding) all of the above still stand.

post #19 of 22

Well not sure what is making them sound grainy and slightly boomy at times. The review felt like spot on the way you described the Superlux HD-668b with the DG.

The reviews about Xonar DG say'd that it's fairly neutral sound card.

Maybe the Fiio E10 is a good pairing with the Superlux HD-668b? At least reviews say it brings the mid range more forward.

According to reviews it can make the headphones sound slightly dark, so maybe smoothing out the harshness of the Superlux?

Some say'd it will even tame a pair of Grado headphones.

Never mind, i shouldn't read and type when im tired.


I have pair of Akg K240 mkII and i think they work very well with the DG. Akg K240 mkII are 55ohm and 104dB/V sensitivity headphones.

Very close in ohm to the Superlux but slightly more sensitive.

Edited by Notus - 4/5/14 at 2:02pm
post #20 of 22

As I mentioned in my first message the sound changes between DG and onboard are very subtle. And because of that my Superluxes sound largely identical with both. The slight boominess in the bass and hardness in the treble became apparent to me only after prolongued listening and at much higher volume than the onboard could produce. But again these changes are subtle and the Superluxes still sounded to me 99+% the same.

That and the further comparisons I did with the Fiio E10 and the Sennheisers led me to assume it all may be just some effects of a high-ish output impedance, not an actual coloration of the soundcard.

But again, it's an assumption based on a hunch and marginal sound differences.


In terms of neutraIity I can't call either (ALC892 or DG) neutral or transparent as Fiio E10 did a much better job at it with both the Superluxes and the Sennheisers. Both headphones sounded to me significantly more tonally accurate with the E10 than with either soundcard. That should rule out any special matching between Fiio and Superluxes (not saying that there isn't one though).


Anyway, I think it's also a logical conclusion. The E10 is well designed ~100$ dac/amp.

The ALC892 is just an all-in-one chip costing a few bucks and the DG is a 30$ soundcard, in which the actual dac/amp section is just a small part of the whole circuit (again costing very little).

I guess it's just another example of the classic "you get what you pay for".


My personal opinion with the HD668B's is that they can be very polarizing. The hyped treble can be really off-putting and can turn noses immediately. Plus their relatively insensitive drivers don't really work in their favor either, especially with low budget sources.. 

They probably need a certain amount of oomph and quality out of an amplifier to really come into their own, just like most other quality headphones.

Extra-treble aside I believe the HD668B is a quality headphone and even on a tight budget and with some EQ-ing (and maybe some modding) they can make do well enough.

Edited by Jim Wingnuts - 4/5/14 at 1:40pm
post #21 of 22
Thread Starter 
Originally Posted by kraken2109 View Post

The effect of output impedance will vary from headphone to headphone, depending on how they vary in impedance across their frequency response. Some headphones will be affected very little due to having a fairly flat impedance across the frequency range, whereas others can vary wildly.

Personally I didn't have an issue when I used my 32ohm HD429 with my Xonar.


My friend as well uses Xonar DG with his HD429 and says the difference is pretty clear. With the on-board audio, he said, the bass was lacking compared to Xonar DG.

So at least it works pretty well for HD429. I'm on this week sending a DOA PSU back to this one store where i'll be ordering the soundcard as well. Once i get it, i'll try and see what the differences are, or what i can hear myself.

Originally Posted by Notus View Post

Amp does more than just increases the volume. Some headphones need more power in some frequency's to sound the way they are meant.

What i can tell from Innerfidelity graphs HD-668b require's more juice in the bass and high's to sound the way they are.

With proper powering they will have more prominent bass and more energy in the high's. That's most likely what you are hearing with the Xonar DG.

With the on-board ALC892 they wont have the power to drive the superlux so they sound more "flat". But i think it could be a good thing in this case as HD-668 has very hot treble even without proper powering. You can turn off the amp if you feel like it, just switch it to line output.


You just described the sound of Superlux HD-668b, grainy treble, boomy bass. At least what it is in some of the reviews. http://www.head-fi.org/t/649623/review-superlux-hd668b


But like i say'd earlier, audio has come a long way and now even the on-board sound cards sound good. At least the better ones out there.

Actually i think technology has come so far that improvements in audio are very subtle until you put a lot of more money into it.

Biggest difference in sound will more than likely come from Amp vs no-Amp.


I think sign of high ohm output is usually hiss with low ohm headphones, IEM's. At least that's what i have understood.


Kraken2109 explained it better.


Mhm, my DT 440's were made (i suppose) to run pretty well across the board even without amp BUT i don't doubt that it will make difference.


Once again, thanks for all the replies, i'll report back here about the actual change what i can hear, once i get the soundcard and get to test it myself!




post #22 of 22

Well i hope you find it to your liking and i will wait to hear what you think about it. Give it couple of day's to "warm up" / burn-in.

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