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#380400 - 07/19/12 10:43 PM Re: DAC for Headphones and Audiobytes [Re: jmone]
Shane White Offline
veteran

Registered: 10/05/08
Posts: 143
Loc: Perth, Western Australia
Headphone volume aside, the DACs in computer soundcards and laptops can be quite variable in quality, so it's worth considering an external DAC. I know people in this forum like to bang on about DACs being a "mature technology", but that's only relevant if that technology is implemented in the device in question.
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Raspberry Pi running Squeezelite->IQAudio Pi-DAC->NAD C320BEE amp->Usher S-520 bookshelf speakers

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#380402 - 07/19/12 10:57 PM Re: DAC for Headphones and Audiobytes [Re: Shane White]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10399
Shane, we should "bang on" about the realities of modern audio technology when sellers of extravagantly priced items appeal to the uninformed or gullible audio consumer.
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#380403 - 07/19/12 11:51 PM Re: DAC for Headphones and Audiobytes [Re: jmone]
jmone Offline
veteran

Registered: 01/08/06
Posts: 158
Loc: Sydney Australia
FYI As my mobo uses the Realtek ALC1200 manufactured specifically for ASUS there are no published specs, though xbitlabs published the following test results in 16bit 44kHz mode:




Edited by jmone (07/19/12 11:52 PM)
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HT:M80s,VP150,QS8,EP500 Outside:2 Pair M3 1 Pair M22 Office:AudioBytes, Games Room: M60,VP150

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#380404 - 07/20/12 12:03 AM Re: DAC for Headphones and Audiobytes [Re: jmone]
jmone Offline
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Registered: 01/08/06
Posts: 158
Loc: Sydney Australia
The testing on of the E10 would indicate that this is way better then the mobo (if I read it right) - http://nwavguy.blogspot.com.au/2012/01/fiio-e10-dac.html:
- Freq. Resp. 10K = +/- 0.1 dB A
- Noise A-Wtd dBu = -98.3 C
- -60 dBFS DNR dB = -97.6 C
- THD+N 0 dBFS 10K = 0.005% A
_________________________
HT:M80s,VP150,QS8,EP500 Outside:2 Pair M3 1 Pair M22 Office:AudioBytes, Games Room: M60,VP150

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#380409 - 07/20/12 03:28 AM Re: DAC for Headphones and Audiobytes [Re: jmone]
jmone Offline
veteran

Registered: 01/08/06
Posts: 158
Loc: Sydney Australia
Originally Posted By: jmone
Issue: I've got a call into Axiom on this one, but when I plug the Headphones into the socket on the Audiobytes flying remote it cuts the output to only the drivers on the speakers (but not the tweeter) when the Vol is between say 0-90%, at 90-100% the sound is cut to the speakers. I'm sure this is not right.


Wow - something is really odd with the Flying remote. At 90-100% all of a sudden you get a bunch of Hiss even when then is no music, but here is the oddest bit....it introduces hiss on the headphones as well connected to the DAC + Vol will drop significantly on this output. I'm a bit worried that there is some form of short on my remote passed the 90% level (and I've already fried one of the Audiobyte Drivers which thankfully Axiom is replacing)....
_________________________
HT:M80s,VP150,QS8,EP500 Outside:2 Pair M3 1 Pair M22 Office:AudioBytes, Games Room: M60,VP150

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#380453 - 07/20/12 02:23 PM Re: DAC for Headphones and Audiobytes [Re: jmone]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4079
Loc: Porch,enjoying Bombay Sapphire
Originally Posted By: jmone
The testing on of the E10 would indicate that this is way better then the mobo (if I read it right) - http://nwavguy.blogspot.com.au/2012/01/fiio-e10-dac.html:
- Freq. Resp. 10K = +/- 0.1 dB A
- Noise A-Wtd dBu = -98.3 C
- -60 dBFS DNR dB = -97.6 C
- THD+N 0 dBFS 10K = 0.005% A




The biggest step up that this DAC will provide over your computer is its excellent and LOW headphone output impedance. This where the most obvious differences in sound quality come from between different DACS, amplifiers and MP3 players. NwAVguy measured it at 0.5ohm which is superb.



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#380700 - 07/26/12 03:24 AM Re: DAC for Headphones and Audiobytes [Re: JohnK]
Shane White Offline
veteran

Registered: 10/05/08
Posts: 143
Loc: Perth, Western Australia
Originally Posted By: JohnK
Shane, we should "bang on" about the realities of modern audio technology when sellers of extravagantly priced items appeal to the uninformed or gullible audio consumer.

I'm not disagreeing with you John. It's just that, as you say, not all DACs are built to the same standard.
_________________________
Raspberry Pi running Squeezelite->IQAudio Pi-DAC->NAD C320BEE amp->Usher S-520 bookshelf speakers

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#380706 - 07/26/12 09:11 AM Re: DAC for Headphones and Audiobytes [Re: Shane White]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4079
Loc: Porch,enjoying Bombay Sapphire
Originally Posted By: Shane White
Originally Posted By: JohnK
Shane, we should "bang on" about the realities of modern audio technology when sellers of extravagantly priced items appeal to the uninformed or gullible audio consumer.

I'm not disagreeing with you John. It's just that, as you say, not all DACs are built to the same standard.


nWavguy's bench test results certainly fall in line with what you are saying. Performance standards for outboard USB DACS are all over the map in terms of output impedance, frequency response, THD+N, IMD, max output, jitter ect. The variations among these DACS are so great that some will even degrade fidelity.

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I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne

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