【體驗CAS，愛與恨的交集】

hongsuki

電源對CAS好大影響嗎？如果我想升級是否應該先換電源線，再到USB線呢？唔該大家來自: iPhone客戶端

nicknick

kenneth_obee 發表於 2012-10-25 11:24
原來係咁

舉個例，電腦內的PCI-e槽等等平時是透過整體電腦的火牛轉換不同電壓來供電的，
Loh兄攪的「核電」，就是為每一個電腦內部要取電的部件使用調節過的shunt或線性牛直接供電，提供最pure最穩定的供電。

外圍的工業用電濾、再生電等等當然他已一早攪好晒了。

又當然，你介紹過的MPD的概念、不要的東西都盡量不要，連display都不要等等的概念，Loh兄早就用緊了，他的CAS是Linux，USB port都disable埋，也是用serial port接駁control的，甚至是用到自行編寫的程式、control完就要甩線才聽等等，甩一條線後的聲音都會有提升...... anyway發燒程度都係我跟唔到的層次。

所以話，玩CAS可以玩到好癲好花心機時間，效果也可以好hi-end，視乎我地想玩到甚麼程度。

nicknick

hongsuki 發表於 2012-10-25 11:32
電源對CAS好大影響嗎？如果我想升級是否應該先換電源線，再到USB線呢？唔該大家 ...

「電」對所有音響器材都重要，而靚的USB線對USB DAC出來的聲音有很大的幫助，
所以我自己覺得兩者都重要，是旦攪一邊都好有效果，你可以選擇處理好一樣才處理另一樣，或者一齊攪。

Lohengramm

kenneth_obee 發表於 2012-10-25 10:32
PSU with low noise floor is the first step to good sound, as it unleashes the potential of your gear ...

Yes.  Focus on low noise floor.

price to performance ratio, should be on doing it from CORE to outside.

What does it mean?

for example,

You have a Mother Board accepting 24pin ATX powersupply.   You have few options to power on it. ( make it simple )

i) a big PC switching transformer 400W - 1000W range ( powered from your Wall socket )
ii) PICO powersupply powered by a small blackbox switching transformer ( powered from your Wall socket )
iii) PICO powersupply powered by a linear power supply ( powered from your Wall socket )

Guess which one will give you a "better quiet" sound ??



IF you apply the rule "CORE to outside",

then, you may not spend $3,000 ( random e.g. )  to buy a PowerCable and swap the "Wall socket to Transformer" junction.

This $3,000 ( random e.g. ) may be better spent on getting a PICO powersupply  + 1 linear power module to power the PICO.

"CORE" means, choose whatever "nearest / closest" possible of the power route.




Second guide,

Avoid any of switching power component within your system, try your very best to avoid / cut them.  The more you can do, the better sound will be your CAS.  ( because you make less high-frequency noises which typically brings Harsh sound of CAS )
e.g.
-never use switching transformer powersupply ( unless it is well designed with good filtering stage )  
-Try to swap them with a Linear Power Supply instead.




Questions are welcomed, trying my best to share whatever I know... ...

obee

Lohengramm 發表於 2012-10-25 12:26
Yes.  Focus on low noise floor.

price to performance ratio, should be on doing it from CORE to ou ...

"PICO powersupply" might not be less noisy than a good ATX-standard PSU which has good filtering components inside.
Because "PICO" aims at small size (that's the meaning of pico) and low cost.

obee

Lohengramm 發表於 2012-10-25 12:26
Yes.  Focus on low noise floor.

price to performance ratio, should be on doing it from CORE to ou ...

Agree with your example, buying a good power cord is a good idea, especially consider the resale value.
No one (in HK) will buy a used ATX PSU at 80% of the market price. But for brand power cord, lot of people would like to buy at 70-80% of market price.

Lohengramm

nicknick 發表於 2012-10-25 12:00
舉個例，電腦內的PCI-e槽等等平時是透過整體電腦的火牛轉換不同電壓來供電的，
Loh兄攪的「核電」，就是 ...

nicknick hing,

I think I've seen K-obee hing in avf.  
So, I think he knows what my progress is up to.

Repeat pointing out what I did in avf might not be proper to do so in here.

I came here because this topic  【體驗CAS，愛與恨的交集】 {:9_430:}

It recalls my long CAS journey; the pain, and the gain. ( sadly, most of the time is PAIN !    )

I am here to help or perhaps giving you guys more pain.

hongsuki

nicknick 发表于  28 分鐘前
本帖最後由 nicknick 於 2012-10-25 12:05 編輯   
   hongsuki 發表於 2012-10-25 11:32      
電源對CAS好大影響嗎？如果我想升級是否...

明白了，唔該nicknick兄，又要努力搵錢再提升了，姦爸爹！來自: iPhone客戶端

nicknick

Lohengramm 發表於 2012-10-25 12:39
nicknick hing,

I think I've seen K-obee hing in avf.  

oh, 我都冇留意添...

明白，間中回憶D愛與恨，真係幾回味。

一向hifi都係gain and paint，冇左paint又唔覺gain，唉，hifi發燒友好似都有D自虐傾向.....

StevenTam

再次謝謝各位C-hings的關注和支持，沒想過這分享能在這引發如此大的回響，無疑也為我注入了一份原動力在將來繼續分享
【愛與恨的交集】雖是這分享的主題，不過其實過程中我是十分享受的，在音樂間能感受到每次小升級的回報，每次額外投入的一小價值，是愉快且難忘的；若硬要說痛苦的地方，我想與絕大部份發燒友一樣，就是努力賺錢去買音響吧～（笑）


借此回應一下C-hing提出關於"電源"的論題，也是一個我十分重視的地方，"電源"無論係音響那一個環節都是非常之重要的一環，甚至我聽過有些前輩分享玩音響就是要先"玩電"，不過他們所指的"玩電"其實一點也不便宜，也非一般剛投入的用家願意接受

一些比較資深或者已經感受過，升級機內線或者過機線時，那種小付出，大回報的體驗，是難以抵抗的，其後自己在機內換入一些發燒電源相關原件之類的，有機會可以玩出很高C/P值的聲音 (當然相對地也有很多失敗的例子)，然而，我個人卻不怎鼓勵這種造法，特別是一些高價位的成品機，一旦修改，就再難有二手市場

可能我仲係年輕，我覺得沒有器材會玩一世的（除了雜誌會寫"可以聽足一世"外），幾年間能不換機已經是很難得了
其實換入一個發燒級別的牆插，花上幾百升級機內FUSE，找條預算許可高品質的電源線，提升還是相當明顯和具效率的
不夾聲可以重來，不滿意又可以再升級，易拔易插，最重要的還是產品擁有一個共同討論的空間

這是我個人的想法～