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zhengxin




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Re:Re:动手打磨X-Fi任何版本,都可以让低端的

Quote:
引用第48楼ter1于2007-07-28 22:03发表的 Re:动手打磨X-Fi任何版本,都可以让低端的 :
前天刚花了13.5刀在national的网页上定了5个LME49860MA运放。。。

Hi xxxx,

Thank you for your sample order from National Semiconductor
.......



怎么我申请的时候他一分钱没有要? 我其他的也乱七八糟的要了一大堆,全是免费。而且已经寄出来了
顶端 Posted: 2007-08-11 17:36 | 60 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的extreme music模

Originally Posted by ter1 
Hi Germanium, could you confirm the red-dotted ones in the picture are the exact caps need to be shorted?

Do you know which op is for line-in recording? one 5532? I want to replace it with LME49860 too. Thanks!

Yes indeed the red dotted caps are the ones to short. The one in the pic that you labled "Line In" is correct. I don't have the card out of my computer now as I'm enjoying it very much. Next time I pull it out I will compare your pics with the real deal & see if the area you asked is dell specific though that may be a while. I looked up the specs on the AKM ADC & though not quite top of the line it is extremely good. Those four large caps next to it can be increased to 1000uf from 470uf. The pdf from the website for akm confirms that that will lower distortion in the bass region, not that that is a real problem though as creative has done a good job on this board, at least in that respect.

I also bypassed the 220uf power supply cap with1-3.3uf metalized film cap and in the row of caps closest to the DACs I bypassed the 100uf cap with 2-3.3uf metalized film caps in parallel & the 47uf cap was bypassed with 1-3.3uf metalized film cap. I wanted to keep these proportional to each othe to match the prportion of the caps they were bypassing. This is what really opened up the soundstage. There is only room enough to do this with one of the dacs so make sure it is the front channels DAC which is closest to you when you open computer case.



Bypassing the power supply caps with metalized film not only opened up the soundstage but made the treble smoother sounding as well as way more detailed. Bypassing power supply cap with metalized film is not new but I do it differently because the way most companies do it leaves a discontinuity in the sound in that the mids still sound slightly muffled & the highs sound open & sweet the way they do it (they do with caps that are way smaller than mine such as 1uf or less). I wanted to open up the midrange so it doesn't sound muffled & going to bypass caps this large improves the sound all the way down into the upper bass so there in no muffled sound anywhere in whole frequency range. It does this by lowering the output impedance of the powersupply throughout the frequency range. It is this lack of muffled sound that brings out the sounstage & life of the music

By the way don't let anyone tell you if you can't measure it you can't hear it. I have run the tests & it measure dead on in frequence response to the stock card. Distortion measured .0001% worse (big WOW) but when you look at the spectrum the modded card looks superior to the stock card in that the noise floor is much cleaner with a lot fewer spikes but just one or two spikes that go slightly higher than the stock card. Even though there are very slight diferences in the measured performance none are sufficient to explane the difference in audible performance!!
顶端 Posted: 2007-08-14 21:26 | 61 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的extreme

图片:
some more info will come soon...
顶端 Posted: 2007-08-14 22:28 | 62 楼
nadesicozhao


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1

不是我打击楼主,01 plus的音质就是一垃圾
顶端 Posted: 2007-08-14 23:41 | 63 楼
lujinwen




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英文看不懂

英文看不懂
顶端 Posted: 2007-08-15 13:40 | 64 楼
ourkun



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Re:动手打磨X-Fi任何版本,

主要问题是有多少人会 而且精通达打磨  呵呵
顶端 Posted: 2007-08-15 17:11 | 65 楼
lujinwen




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Re:动手打磨X-Fi任何版本,

英文看不懂 
顶端 Posted: 2007-08-15 18:25 | 66 楼
ter1




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Re:Re:Re:动手打磨X-Fi任何版本,都可以让低端的

Quote:
引用第60楼zhengxin于2007-08-11 17:36发表的 Re:Re:动手打磨X-Fi任何版本,都可以让低端的 :



怎么我申请的时候他一分钱没有要? 我其他的也乱七八糟的要了一大堆,全是免费。而且已经寄出来了



没错,用公司的信箱就注册可以1分钱不拿得到5个sample。
顶端 Posted: 2007-08-16 22:10 | 67 楼
big-eblis




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Re:动手打磨X-Fi任何版本

看了那么多,我认为都是扯淡
管你装了多少补品上去,电源不行有屁用!
就电脑那种电源,干扰大,电压单一(PCI只有3.3V/5V/+-12V),你就是把卡上的模拟部分元件全换成补品又如何?电源过来的干扰把它全部轰杀!
更不要说机箱里的大量电磁干扰了。
只有尽量提高数字输出的性能,然后外接DAC才会有好的表现。
顶端 Posted: 2007-08-17 11:41 | 68 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的extreme

声音自然是有提高滴。。。 pchifi总是比不上纯hifi,就是DAC10也没用。。。
顶端 Posted: 2007-08-18 09:27 | 69 楼
kobecao

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Re:动手打磨X-Fi任何版本

所以我打磨~主卡也没有打磨~

现在主要想磨好数字部分~然后外置解码~听音乐咯

还改了一下外置盒耳机输出口~力度加强一点
顶端 Posted: 2007-08-18 10:52 | 70 楼
hahvv

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Re:动手打磨X-Fi任何版本,

我在淘宝上看到一个人换了 ram结果装驱动不稳定了,
顶端 Posted: 2007-08-18 11:18 | 71 楼
ter1




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Re:Re:动手打磨X-Fi任何版本,

Quote:
引用第71楼hahvv于2007-08-18 11:18发表的 Re:动手打磨X-Fi任何版本, :
我在淘宝上看到一个人换了 ram结果装驱动不稳定了,



能提供链接么?
顶端 Posted: 2007-08-19 21:30 | 72 楼
hahvv

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Re:动手打磨X-Fi任何版本,

他写的350 ,现在找不到了估计卖出去了,也许是焊接的不好,当时都想下手的,讲不下价来。
顶端 Posted: 2007-08-19 21:36 | 73 楼
azm1985



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Re:1

Quote:
引用第63楼nadesicozhao于2007-08-14 23:41发表的 1 :
不是我打击楼主,01 plus的音质就是一垃圾


LZ引用的文章说是Benchmark DAC1 而不是SVDAC01Plus

Quote:
I actually prefer the fully hotrodded X-Fi XtremeMusic over the Benchmark DAC1


超过Benchmark DAC1虽然有点难以置信,但是音质的提高是肯定的。
顶端 Posted: 2007-08-20 07:20 | 74 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的extreme

shorted the line in coupling caps as well as the other mods & got these results in windows vista.

24 bit 96Khz
Frequency response +.01,-.04
Noise level -116.2
Dynamic Range -116.0
THD .0007%
IMD+noise .0010%
Crosstalk -111.2
IMD+noise (swept freq).0008%

Very very good results I would say. Noise floor lowered a bit in windows vista when I shorted the line in coupling caps & distortion went down slightly. Stereo seperation improved as well. Mine is totally clean on the noise test, Only one low frequency spike no higher than -124db Otherwise all noise is below -130db. All noise above 200Hz is below-140db & at 3KHz is -151.43!!!!!

--------------------------------------------------------------------------------
顶端 Posted: 2007-08-20 21:06 | 75 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的


Thank you for your very detailed info!! I'm now want to have a summary w/ picture....

1. The red-dotted caps need to be shorted.
2. The blue-dotted op is for line-in, need to be replace with LME49860.
3. The 4 caps with blue "100" be bypassed with 2 3.3uf metalized film caps in parallel.
4. The 4 cpas with "47" be bypassed with 1 3.3uf metalized film cap.
5. The blue-line 4 caps can be replaced to 1000uf ones for ADC.

Are the above right? If so, I think lots of modder will follow...

but is the 220uf power supply cap as you stated "I also bypassed the 220uf power supply cap with1-3.3uf metalized film cap" the Jamicon near the DSP?

Also, I have some questions about your mod,
1. Do you suggest to replace the power caps (both "100" and "47") with more capacitance BG ones? If with more capacitance ones, the capacitance for film caps need to be changed too, right? --------or--------------
Just replace them with the same capacitance 100uf/25v and 47uf/16v BG ones with your suggested bypassed caps,
which will be the better choice?

2. After your mod, how about the RMAA frequency response line for 96kHz? Still sharp drop after 20kHz?

3. I'm thinking the caps of 4,5,6,7,8,9,10,11 are for the ADC, what's your suggestions of them? Replace with better BG ones? How about the capacitances? Bigger?

4. What's the functions of cap 1,2 and 3? What's your suggestions?

5. What metalized film caps are you using? Suggest more better ones?

I know it's quite a lot of questions, but we all want to make elite pro even better.... thx...


It's better you take a shot of your mod!~~

The above description is correct except I did not change the 470uf caps to 1000 but did read in the design sheet that that could be done to get very slightly better low frequency distortion. I also only did the front channels so I only bypassed the 100uf closest to the outside of the board & the second 47uf cap in the back row. There is not enough room to put 12 of these mettalized film caps that it would take to do all channels. I only use stereo anyway.


1. No do not change those caps size as that is what Cirrus logic calls for as far as the 100uf one, the design sheet calls for 33uf where the 47uf cap is but I doubt that that one is critical but 100uf one is probably critical.

2 excellent response to 43KHz. -.12db. The recording setting setting settings must have been set wrong. That is why other people were getting the sound chopped at 20KHz. Set correctly it should go all the way to 44KHz with almost no rolloff.

3. cap 4&5 are coupling caps & can be shorted. The others I'm pretty sure are powersupply. I would leave these at their stock size & maybe use BG caps. Shorting 4&5 improved performance in several areas with no drawbacks.

4.caps 1&2 are +&-12volt powersupply for the analog output opamps. I'm not sure of th number 3 cap.

5.Didn't see a brand name but they are polyester 3.3@100volt. Higher voltage ones may sound better but take up much more room & would stress the solder connections.

no pics as Headfi won't accept my pics as they are to large.
顶端 Posted: 2007-08-20 21:08 | 76 楼
ter1




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Re:动手打磨X-Fi任何版本,都可以让低端的extreme

刚买了几个金钟罩。。。台湾代购
顶端 Posted: 2007-08-28 18:50 | 77 楼
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1

小学水平看不明白
顶端 Posted: 2007-08-28 21:51 | 78 楼
michael05




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好大  好大  真大  强。。。。。。。。。

好大  好大  真大  强。。。。。。。。。
好大  好大  真大  强。。。。。。。。。
顶端 Posted: 2007-08-29 15:00 | 79 楼
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