電腦電源相位校正CAS出靚聲

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電腦電源相位校正CAS出靚聲
普通電腦電源開關干擾大﹐最近一種PFC(Power Factor Correction)調頻+PWM 全橋
LLC式電腦電源﹐如香港產HUNTKEY X7 900W電腦電源足夠讓CAVS聲畫昇級到HIEND。

http://www.hardwaresecrets.com/p ... -Supply-Review/1446

http://www.seasonic.ru/products/items/40

wakalaaa

隻x7都出左幾年啦喎，點解而家先有人講？

xiongski

好多靚火牛仲勁過佢添！

xiongski

好多靚火牛仲勁過佢添！

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wakalaaa 發表於 2012-12-14 15:03
隻x7都出左幾年啦喎，點解而家先有人講？

我買了幾個300美元以上的牛拆開都不HIEND﹐如果看價錢買也可能裡面系普通的PFC牛﹐
有那個電腦鋪肯拆開比你看﹖

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xiongski 發表於 2012-12-14 17:15
好多靚火牛仲勁過佢添！

有那些系PFC + FULL BRIDGE + LLC結構而適合HIFI的呢﹖最好加上系同步整流.

手上有個TURBO-COOL 1KW-SR ﹐因尺寸過長而沒辦法安裝; 能否講下裡面應用那些HIEND技術﹖

http://www.directron.com/t1kwsr.html

xiongski

噢，ic,多謝師兄解釋！

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xiongski 發表於 2012-12-15 10:45
噢，ic,多謝師兄解釋！

剛實驗該ＨＩＥＮＤ級電腦電源﹐光縴接DAC到汽車2.1系統﹐從音樂完結時聽到﹐
聲音沒有普通電源抖動那么多﹐人聲清晰一Ｄ﹐高音少了一點﹐應該系干擾少了。

分體電源外觀吾ＨＩＥＮＤ.

筆者摩改PFC電腦７００Ｗ電源成１５Ｖ給電腦音響供電（汽車功放）﹐在調整負反
饋電壓過程中會感覺到聲音由硬到軟或者軟到硬。因此PFC電腦電源比電池聲軟。

odysseyhk

Many PC now use an external power supply instead.  That allows easy swap to use high quality linear power supply.  I'd prefer this approach.  

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odysseyhk 發表於 2012-12-15 13:25
Many PC now use an external power supply instead.  That allows easy swap to use high quality linear  ...

But外觀吾ＨＩＥＮＤ

xiongski

音響係用耳仔嚟聽嘅，唔係用嚟睇嘅！靚聲就萬萬歲啦！

odysseyhk

天下第一刀 發表於 2012-12-15 13:53
But外觀吾ＨＩＥＮＤ

I don't quite understand. Are you saying that your posted picture look more high end? Is it your posted picture of a high end CAS?

kelvinhin

最靚聲同hiend就一定係線性牛, 不過佢要做到大火數輸出就好貴, 而且體積會非常大.

odysseyhk

kelvinhin 發表於 2012-12-15 19:58
最靚聲同hiend就一定係線性牛, 不過佢要做到大火數輸出就好貴, 而且體積會非常大. ...

Agree, linear power supply is a must. I use 12v 6A linear power supply. Not too big. From Taiwan and happy with it's performance.  It is less than 2k .

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odysseyhk 發表於 2012-12-15 16:06
I don't quite understand. Are you saying that your posted picture look more high end? Is it your p ...

The power supply is high-end  looking only , But I'm not sure it's PFC+PWM full bridge out put and LLC or not.

High-End CAS is High-end Power supplies + Hi-end CPU + Hiend digital sound card to High end DAC + Hi-end amplifiers + hiend speakers

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kelvinhin 發表於 2012-12-15 19:58
最靚聲同hiend就一定係線性牛, 不過佢要做到大火數輸出就好貴, 而且體積會非常大. ...

對電腦而言﹐線性牛不會比PFC+電流控制PWM full bridge＋ＬＬＣ＋同步整流技術
輸出好﹐PFC相位調整有穩壓輸出﹐電流控制PWM有消除輸入干擾的作用﹐full bridge全
橋提供全波輸出﹐ＬＬＣ接輸出整形成正弦波﹐同步整流在提高效率的同時消除整
流二極管那種干擾。

HIEND的ＣＡＳ系用磁環做的小牛或laser將數碼音頻跟電腦完全隔離﹐後輸出到獨
立的DAC

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odysseyhk 發表於 2012-12-15 20:35
Agree, linear power supply is a must. I use 12v 6A linear power supply. Not too big. From Taiwan a ...

I use +_25V and +18V linear power supplies for DAC . That mean the power supplies for DAC are double regulated

The photo is my DIY double and double regulated power supplies for my DAC

odysseyhk

"對電腦而言﹐線性牛不會比PFC+電流控制PWM full bridge＋ＬＬＣ＋同步整流技術
輸出好﹐PFC相位調整有穩壓輸出﹐電流控制PWM有消除輸入干擾的作用﹐full bridge全
橋提供全波輸出﹐ＬＬＣ接輸出整形成正弦波﹐同步整流在提高效率的同時消除整
流二極管那種干擾。

HIEND的ＣＡＳ系用磁環做的小牛或laser將數碼音頻跟電腦完全隔離﹐後輸出到獨
立的DAC"

Thank you for sharing your way to go hiend.  I think there are different way to achieve hi-end sound.  Hiend CAS is still evolving and may not be in the form what you described.

Transformer isolation and optical isolation is electrically isolated but the transformer and optical component quality impact the end results significantly. e.g. toslink is good in electrical isolation but not good in jitter.

There are DAC with built-in SD card reader which is interesting approach.  Advance in streaming audio may be another good solution.

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odysseyhk 發表於 2012-12-16 02:18
"對電腦而言﹐線性牛不會比PFC+電流控制PWM full bridge＋ＬＬＣ＋同步整流技術
輸出好﹐PFC相位調整有穩壓 ...

在此貼講ＣＡＳ系離題一Ｄ。
但你講的ＳＤ　ＣＡＲＤ就如馬仔的ＳＡ８００４方案﹐不是ＣＡＳ。
在將ＵＳＢ　ＳＤ　ＣＡＲＤ跟　ＵＳＢ　ＨＡＲＤ　ＤＲＩＶＥＲ同樣的文件復
制到電腦的過程中發現﹐ＵＳＢ　ＨＡＲＤ　ＤＲＩＶＥＲ比ＵＳＢ　ＳＤ　ＣＡ
ＲＤ快﹐但ＨＡＲＤ　ＤＲＩＶＥＲ在播放過程中會引起聲音抖動﹔

如果將ＨＡＲＤ　ＤＲＩＶＥＲ中的音樂文件先讀入電腦中的內存結果跟
ＳＤ　ＣＡＲＤ一樣﹔
但不同的Memery播放的音色也不相同。

我用創新的EMU-1010專業CARD播放發現光縴輸出跟馬仔的ＣＤ機光縴輸出接同一個
ＤＡＣ聽感沒有分別﹐同軸輸出音質相同﹐但慢了﹐可能１２尺同軸引起延遲﹐聽
感大概系﹕１０００ＨＺ變成９９９ＨＺ。

alamakazam

I think this is the lowest noise in consumer market

corsair ax1200i

http://www.jonnyguru.com/modules ... Story3&reid=300