1. Con    06 Jul 2013 @ 00:34   

    LM4972 is a good choice. But only replacing the final opamp will not improve dramatically the board performances. The one important mod is the clock, and another one is the power system on the board. This last one is quite complicated, but with very good results. In way, clock and power should go together. Is not big deal to have a very good clock powered by a poor quality power system. And not at all a big improvement with a good quality power running a low quality oscillator…

    A quite large information quantity about Xonar mods it may be find in this forum/thread:

    This is may last post in this thread:

    “Well, it is a while since this my mod project were started, done and very well working.

    In the last I have changed my PC motherboard, and processor. I use now Asus Z87-Deluxe and Haswell processor. Less heat inside the enclosure, less need for ventilation, more quiet machine, and the results are just unexpected high.
    I see that with some more quality improvements for the components in this mod, the whole sound system it may bring just exceptional results, never attained before for a PC based sound system.

    I decided to start it again this project, but this time to realize a full profesjonal kit to be attached to the Xonar STX card. I just bought a new sound card which I will use to develop and realize this kit. I think this mod it will be exclusively destined to Xonar STX sound cards, as this type of sound card is most suitable for a high end PC based sound system. I`m of that concept that the music it have to come (natural way) from the front of the listener, so the stereo system is the most natural way to bring sound information to a subject. A sound scene it have to be developed based on stereo sources.

    I plan to design an extra added PCB, which it may fit the original one, and will take a smaller place inside the computer. The kit board have to be quite easy to be attached, with points to be connected to the original sound card.
    This mod will have a completely new analogue output stage, powered from a analogue PSU, and an high quality clocking system, powered from battery. Additional decoupling/filtering capacities it will be placed on this extra board too. I wish to use analogue power for whole the needed tensions on this board, but so it may be needed for an extra transformer… I will see what it may be at least the right way to be done.
    I think it will be a quite expensive result, but as known, high quality results it cost a little more…”

    Because is quite difficult to follow two forums, I suggest to those interested in this subject, to follow the discussions in the DIY Audio thread.


  2. Razakiel    11 Jul 2013 @ 01:01   

    My STX Card has a swollen capacitor wich is used for digital. sany oscon. do you think i can change to 1800 microfarad cap instead? or should i just get a new with the same values?


    • Razakiel    23 Jul 2013 @ 01:20   

      desolder the oscon and put in nichicon hz 1000uf 16v. and the sound is friggin amazing now and im using digital wich shouldnt need other caps acoording to a lot of people but the joke is on them.


  3. Scotty    11 Oct 2013 @ 09:01   

    Con I have a Essence ST that I would love to have all the mods you suggest, but I just don’t have the expertise necessary to do most of them. Would you consider doing the mods on my card for a fee?


  4. Andrew    27 Jun 2015 @ 03:44   

    I got the MUSES8920 it’s supposed to be much better in THD and overall output, the frequency response is also greater than the original Opamp… original card I had was 107db 0.0017% THD, the new opAmp is 0.00004% THD with 135db output.

    Old opAmp 5532D

    New opAmp MUSES8920


    • Andrew    28 Jun 2015 @ 03:16   

      The sound quality is amazing btw, I ran pink noise through the sound card for 8hrs last night while I slept, tonight I will use a frequency sweeper and bring out all of those tight sounds. The best part about this setup is with GX2.5 I get very good sound precision in games, and with the OpAmp even the tiny sounds that would normally be missed creep out at you, and your left thinking… wow I couldn’t hear these details before.

      +++ MUSES8920 produces a rich vibrant sound paired with a 24bit 192khz sound card.


  5. SlimBo    31 Dec 2015 @ 21:18   

    hi Everybody
    i need help with my Asus Xonar DS
    i want to short some caps for better sound clarity but i don’t know which one…
    i have done it whith my X-fi and the difference it’s amazing

    i thank you for your help in advance 🙂

    sorry for my english



Leave a Reply


Your comment may be held for moderation. If it does not show up immediately, just be patient.