FIELD SHAPING GROUND PLANE RIBBONS : 加第三條銅箔：死得！

Alman 發表於 2014-4-28 07:32

本帖最後由 Alman 於 2014-6-1 05:52 編輯

周身痕，在Tweakers' Asylum 找到新嘢玩：

Field Shaping Ground Plane Ribbon

大致是用跟喇叭線相同長度的銅箔，一邊接amp的喇叭輸出負極，另一邊不接喇叭；而兩者相隔四吋。

有關links：

http://www.audioasylum.com/cgi/vt.mpl?f=tweaks&m=188818

http://usr.audioasylum.com/images/6/62925/DSC00017.JPG

http://shop.mapleshadestore.com/products.asp?dept=227e

FIELD SHAPING GROUND PLANE RIBBONS

Reshaping the electromagnetic fields that inevitably surround your components and cables will make startling improvements in the top-to-bottom clarity of your sound. Just connect our two 8' Ground Plane Ribbons to your amplifier’s black (ground) speaker terminals and then lay them alongside your speaker cables, about 4" away, leaving the Ribbons’ far end unconnected.

Why such a powerfully beneficial effect? Every hifi system has a ground plane, shaped by the accident of where the ground wires in your cables, interconnects and power cords happen to lie. Fields form between that ground plane and any neighboring wire at a different voltage. The fields extend many feet. Any of your room’s non-conducting materials within the fields absorb energy from your music signal, thereby smearing and compressing it. That’s greatly reduced by reshaping and concentrating those fields with our carefully-optimized Ground Plane Ribbons (see Ground Plane Owner’s Manual on our website for more of the physics). Guaranteed to have way more effect than the 6" long Audio Prism Ground Control dongles.

小弟用多餘的銅箔開工：

http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0001.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0002.jpg

包 teflon tape：
http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0004.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0005.jpg

用四吋飲管暫時頂檔分隔喇叭線及銅foil ：
http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0011.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0007.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Shaped%20SC/DSCF0008.jpg

有tweaker稱接正極好效果過接正極，故小弟以 copper ribbon先接amp喇叭輸出正極，後接負極，最後不接任何極作比較。

試音：

用小弟試音必備的"春江秋月夜"， "陽關三疊"， "沖天炮"及"舟山鑼鼓"

首先接正極，即感音場擴大，低音豐富，鼓聲更solid和深沈, 背景樂器較未用 copper ribbon 前突出，即聽多了細節。 {:1_351:}

接負極，跟正極表現相近，但好似低音會鬆化些。

最後不接： what the hell！即要停機：皆因成個音場縮細，聲音變乾，沒神沒氣。。。走不回頭了！這情況正如上次用ground loop的一樣!

小弟打算稍後再整理好兩線距離（盡量四吋平衡）. 各位有興趣可以整整，一同印正！

teddyng637 發表於 2014-4-28 07:48

唔錯 {:6_193:}{:6_193:}

zoneaudio 發表於 2014-4-28 13:04

支持man sir{:6_193:}

steve_salsa 發表於 2014-5-1 08:01

Hi CHING may I know where to buy 銅箔? Thx

Alman 發表於 2014-5-2 06:42

steve_salsa 發表於 2014-5-1 08:01 static/image/common/back.gif
Hi CHING may I know where to buy 銅箔? Thx

可去鴨記買銅箔貼，把黏貼兩邊撕開後貼埋用。

我的銅箔取自inductor，在網上買。在港那裡買到， sorry,則不清楚了。

steve_salsa 發表於 2014-5-2 08:55

thx ching!

Alman 發表於 2014-5-26 10:27

本帖最後由 Alman 於 2014-5-26 10:29 編輯

幾個實驗：

從網上參考有其他人的經驗，做了以下有關ground loop 及銅箔Field Shaping Ground Plane Ribbon的試驗，跟大家分享下：{:1_352:}

銅箔 Ground Loop

短短一條ground loop的效果明顯。有人用８in 闊銅箔做，稱有好效果，而ground loop 的重點是要面積大及用的線要獨立絕緣（例如用漆皮線）。遂用剩下的銅箔喇叭線整了對肥仔ground loop，代替瘦猛猛的漆皮GP：

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0001-3.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0002-3.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0005-2.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0003-3.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0007-2.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0009-2.jpg

用上肥仔GP：聲音在空間感及通透方面有可聞改善{:1_351:}

加大喇叭線負極：

加大訊號線負極確有好處，加大啦叭線的負又如何？search過不是太多資料，但也有些類似討論。

小弟一連試了（１至３接有銅箔plane，全程用肥仔GP）：

１。把一條Neotech１４awg單支線駁amp 負及speaker 負極

２。只把Neotech１４awg單支線駁speaker 負極；

３。把銅箔field shaping 線改接喇叭的負極（非接原来的amp喇叭負輸出）代替Neotech；

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0014.jpg

４．拆除銅箔不接任何東西．

每一試驗都聽同一首曲，結果：

聽１時，感高頻和分析提升，空間感大；
聽２時，呵！動態大增，音像變大，十分過癮，而分析力沒減；
聽３時，頓覺無嚟神氣，音場縮細及濛；
聽４時，跟３的情況相似．

暫時覺得１的情況最平均，合小弟心水．接下來打算試bi wired 加銅箔field shape 線，再揀一最佳 config！{:1_253:}

billymud 發表於 2014-5-26 11:23

本帖最後由 billymud 於 2014-5-26 11:29 編輯

In HongKong, 銅箔可在Taobao 網上買。
any size, any length, any thickness........... pre-cut per buyer's specification. {:1_351:}

用漆皮線, apply fine gauges for best result (e.g. 40~42 awg ).... 瘦猛猛的nylon or polyester皮 !as mentioned by Sir Alman.

Alman 發表於 2014-5-27 11:24

三線齊出．．．．

今次試埋bi wired 加copper ribbon，效果．．．．真是無話可說！{:1_351:}

先用Neotech PCOCC單支銅１１awg走低，銀織線走高時，已感到音效較用jumpers有改善，包括質感，分析及鬆容度．今日求其駁埋對copper ribbon，試音：

Amp side：
http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0006-3.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0007-3.jpg

Speaker side：不理會與喇叭線的距離住先， copper ribbon搭住肥仔ground loop 用夾調較高低：
http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0003-4.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0004-4.jpg

http://i2.photobucket.com/albums/y25/firebird/Ground%20Loop/DSCF0005-3.jpg

聲音：
好似換咗機！整體聲音厚潤之餘富body／texture，音場擴大但solid，樂器各就各位，聽到更多弱音！一句，更傳真{:1_253:}

未搞咁多嘢前，覺得用bi wire 和用jumper 的分別不大，但今次今非昔比：用d線加加減減已有不同效果，玩死！{:1_260:}

得閒再聽真之餘，會整多幾條copper ribbons駁amp 的RCA 或拖多幾條＂尾＂，看又如何？{:1_343:}

ropresident 發表於 2014-5-29 13:48

Alman 發表於 2014-5-27 11:24 static/image/common/back.gif
三線齊出．．．．

今次試埋bi wired 加copper ribbon，效果．．．．真是無話可說！

請問一下ALMAN兄, 不同線接駁喇叭負極是否極大影響 ?

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FIELD SHAPING GROUND PLANE RIBBONS : 加第三條銅箔：死得！