Comments on: Asus Xonar U1 Midnight Mods Session http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/ Mon, 21 May 2012 04:34:33 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Jimmy Auw http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/comment-page-1/#comment-124451 Jimmy Auw Sun, 25 Apr 2010 05:53:00 +0000 http://jimmyauw.com/?p=766#comment-124451 Hi, Never tried it with IEM, but I think this caused by poor supply. If you do really need it, you can set external 5V supply with regulator, like LM317. I'm quite confident this could remove the noise. Thanks. Hi,
Never tried it with IEM, but I think this caused by poor supply.
If you do really need it, you can set external 5V supply with regulator, like LM317. I’m quite confident this could remove the noise.
Thanks.

]]> By: striker http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/comment-page-1/#comment-124443 striker Fri, 23 Apr 2010 17:25:39 +0000 http://jimmyauw.com/?p=766#comment-124443 Hi I am interested in getting a U1 as well. I read from some reviews that this usb sound card has a bit of hissing noise when listened using an IEM. May I ask if your mod would fix that? If not, is there a way to remove the noise? Thanks Hi
I am interested in getting a U1 as well. I read from some reviews that this usb sound card has a bit of hissing noise when listened using an IEM. May I ask if your mod would fix that?
If not, is there a way to remove the noise?
Thanks

]]> By: oohms http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/comment-page-1/#comment-124056 oohms Thu, 14 Jan 2010 09:43:14 +0000 http://jimmyauw.com/?p=766#comment-124056 The small capacitors are for input decoupling (line/mic level, before the relay) and the 2 large capacitors are for output decoupling into headphones. High quality low ESR capacitors (not much smaller than 1500uF), bypassed with a smaller (1uF or so) polypropylene caps should make it sound a little better. The last remaining capacitor is for the 5v supply from the usb port IIRC. The opamp has no role in audio output, and the c-media chip has an internal opamp/headphone amp which it uses. Disconnecting the USB power supply and using an external one should also give better sound. Good luck! If only the drivers would support 44.1khz without resampling :( The small capacitors are for input decoupling (line/mic level, before the relay) and the 2 large capacitors are for output decoupling into headphones. High quality low ESR capacitors (not much smaller than 1500uF), bypassed with a smaller (1uF or so) polypropylene caps should make it sound a little better.
The last remaining capacitor is for the 5v supply from the usb port IIRC.
The opamp has no role in audio output, and the c-media chip has an internal opamp/headphone amp which it uses.

Disconnecting the USB power supply and using an external one should also give better sound.

Good luck!

If only the drivers would support 44.1khz without resampling :(

]]> By: Jimmy’s Junkyard » Blog Archive » More… Asus Xonar U1 Mods http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/comment-page-1/#comment-119546 Jimmy’s Junkyard » Blog Archive » More… Asus Xonar U1 Mods Sun, 10 May 2009 04:40:25 +0000 http://jimmyauw.com/?p=766#comment-119546 [...] around 20 hours testing of my previous Asus Xonar U1 Mods, I think I need to add some more mods [...] [...] around 20 hours testing of my previous Asus Xonar U1 Mods, I think I need to add some more mods [...]

]]> By: nobody http://jimmyauw.com/2009/05/08/asus-xonar-u1-midnight-mods-session/comment-page-1/#comment-119542 nobody Fri, 08 May 2009 01:26:19 +0000 http://jimmyauw.com/?p=766#comment-119542 cool... Hope I have the skill to do this to my U1. Good job. cool…
Hope I have the skill to do this to my U1.
Good job.

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