Thank you for your replies. Maybe this concerns more the ALSA developers.
Yes, the STX drives all kinds of headphones and most of them very well but it
lacks on low impedance (<32 ohm) models. This is due to the headphone output
impedance of 10 ohm on the STX and also on the new STX II. Thus it
theoretically is perfect for headphones >80 ohm, although ASUS claims to have
it (the old STX) optimized for headphones 32 - 600 ohm (probably by its
drivers). Please see:
http://www.innerfidelity.com/content/meridian-explorer-case-study-effects-output-impedance/
(an example to explain the "why?")
http://www.asus.com/News/knWtTLpnXrb1YaqR/ (see "Headphone impedance")
Instead of releasing a headphone output <10 ohm on the STX II (e.g., 2 ohm) to
resolve the old STX's well known issue with low impedance headphones (16 - 32
ohm), ASUS seems to address it on their Window driver (only) for the STX II, as
mentioned before.
Right now, for the old STX, you find on AlsaMixer the following three settings:
<64 ohms (which in reality is 32-64 ohm)
64-300 ohms
300-600 ohms
Thus I really would appreciate - if possible - an additional 16-32 ohm
optimization on ALSA for the old STX; enabling fun playback also on top notch
low impedance headphones e.g., Fostex TH-900 (25 ohm) or Audeze LCD-XC (22 ohm).
Best regards,
Balduin
PS: Maybe you are right and buying an additional headphone amp is the only way
to go when using an old STX...
------------------------------------------------------------------------------
"Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE
Instantly run your Selenium tests across 300+ browser/OS combos. Get
unparalleled scalability from the best Selenium testing platform available.
Simple to use. Nothing to install. Get started now for free."
http://p.sf.net/sfu/SauceLabs
_______________________________________________
Alsa-user mailing list
Alsa-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/alsa-user
