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| [#21] 電反箱問題 交流電相位很容易分清楚，聲音相位就比較難分，主要係聲音相位先要有對比，否則無從估計正相反相，交流電因為有L同N之分，要分清楚是舉手之勞。 音響機器，無論交流電是接正接反，都不可能影響到出來的聲音的相位，不過變壓器的對地電位差、漏磁等會對音效有影響，安規方面也是大問題，值得重視，而這類影響是好是差，一言難盡，用儀器能測出優劣，但不代表聽感是好是壞。 |
simon62 正式會員113.xxx.xxx.30 |
2011-04-07 18:07 | |
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| [#22] 電反箱問題 You can hear the vocal voice slightly forward or backward, if L & N is reversed, provided that your music suystem is good enough. In normal condition, forward is in phase. Talking about signal in phase and out of phase that is totally another topic. All pre-amps and power amps manufactured should be in phase to drive the speakers. If any product involved out of phase should be corrected somehow. |
rcywong 正式會員 112.xxx.xxx.35 |
2011-04-07 20:19 |
| [#23] 電反箱問題 ,  |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-04-08 06:23 |
| [#24] 電反箱問題 電視, Amp, CD 電如果反箱其實有冇安全問題? 對質素有冇影響? 請高手指教 有安全問題, that s why we have N. L and ground wires |
batmanames04 正式會員 202.xxx.xxx.201 |
2011-04-08 09:12 |
| [#25] 電反箱問題 You can hear the vocal voice slightly forward or backward, if L & N is reversed, provided that your music suystem is good enough. In normal condition, forward is in phase. --------------------------------- 完全是天荒夜談，交流電相怎可能影響到聲音相位？電相會影響系統的是干擾而已，例如對地電位，變壓器漏磁等等。交流電相接入變壓器，正相、反相最大影響是漏磁率，交流電經過整流電路後已經變成了直流工作，就再沒有正相反相之說。一套系統是否出正相聲，最好用測試軟件進行。 某些膽前級真的是反相輸出的，例如SRPP電路就是反相輸出。某些音源也是反相輸出，所以有某些解碼器帶正/反相輸出選擇功能。 |
simon62 正式會員 113.xxx.xxx.30 |
2011-04-08 11:17 |
| [#26] 電反箱問題 交流電經過整流電路後已經變成了直流工作，就再沒有正相反相之說。一套系統是否出正相聲，最好用測試軟件進行。 agree x 100 |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-04-08 12:42 |
| [#27] 電反箱問題 電反相與聲音反相是完全兩回事。先不理好聲與否的問題, 保險絲是接在L,火線的, 如果萬一漏電, 燒灰士就可以隔開火線, 保障安全. 如果L和N反接, 燒灰士只會隔開N線, 機殼就會等於直接接觸火線, 絕對有安全問題, 除非你的機殼是全膠殼, 也者你肯定你的機件永不漏電, 否則, 絕不可掉轉L,N. |
老火 正式會員 223.xxx.xxx.102 |
2011-04-08 13:19 |
| [#28] 電反箱問題 絕不可掉轉L,N x 999999999 |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-04-08 13:22 |
| [#29] 電反箱問題 漏電唔理你反唔反相, 漏電斷路制就會即時跳, 日本機兩腳又怎辨怎分? 查實好多電器都係兩腳扮有水線, 包括好多電視 如果知道錯相唔去跟就唔係幾妥, 但講到錯相好似會即刻火燭就誇了一點, 真係大把電器得兩腳, 咁有排驚了. 漏電有漏電斷路制跳你的 講明先, 認識相位是應該去跟的 最後修改時間: 2011-04-08 14:54:14 |
winning7 正式會員 220.xxx.xxx.131 |
2011-04-08 14:53 |
| [#30] 電反箱問題 其實L 跟 N.是可以用萬用表測出來.但可不可以反相.有沒有危險.就真係不知道. |
徐福 正式會員 59.xxx.xxx.142 |
2011-04-08 15:32 |
| [#31] 電反箱問題 I buy a checking plug at SSP just $22 last day, just simply plug on the socket, if 3 lights lightup, it means correct L/N/E position. I have an american type socket which L/N reversed after check, I now reverse the L/N inside and check again, correct now. But afterthat I use it more than 5 yrs lucky no safety problem. |
liquid 正式會員 210.xxx.xxx.134 |
2011-04-08 16:22 |
| [#32] 電反箱問題 電反箱問題 is not the correct term to describe the situation. as live wire always stay in high voltage and neutral wire (sometimes they are connected to ground wire) , can be considered to be zero voltage and you can check it with multimeter unless you change your electricity power by balance transformer like ces spliting 220v to +110 and -110v then you can use the term 電反箱問題 to describe the issue anyway swapping L and N extremely danganerous to you and your family |
batmanames04 正式會員 180.xxx.xxx.158 |
2011-04-08 16:28 |
| [#33] 電反箱問題 其實, 需唔需要咁复雜去發 D 咁學術性既大論呢? 可唔可以簡單咁睇, 供電只系一個 Power supply, 部機系一個 load。 Power supply 嘅 L & N, 最理想狀態系都駁去個 load 相應既 L & N(相應 L to L, N to N)。 但你部機 (load)有時出廠時, 可能 L and N 調轉咗, 咁 Power suply 既 L 就 會接去 load 既 N, 而同樣地 N 就去 L (反相), 咁而家將電線(或墙蘇)既L and N 調轉, 只系咁樣黎就部機 (load), 保證 Power supply 既 L to Load 既 L, N to N。咁樣有乜問題? 同安全有乜關係? |
Jameskyc 正式會員 112.xxx.xxx.78 |
2011-04-08 23:32 |
| [#34] 電反箱問題 Jameskyc, fully understand what are you talking about. electrical applicance with 2pin power cord must come with plastic casing. or double shielding,(international electicity safe rule) that s the reason switching the L and N not dangerous ( for plastic casing and double shielding) Yes, sound will be differnt, but nothing to do with hot , cold of xlr balance connection do you really undestand the L always stay with high voltage and N zero voltage? but most high end audio equipment usually metal casing comes with L, N and ground |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-04-08 23:48 |
| [#35] 電反箱問題 if use 美式,冇fuse;會不會好危險ga? |
sheepsheep1012 正式會員 113.xxx.xxx.198 |
2011-04-09 06:43 |
| [#36] 電反箱問題 ＞if use 美式,冇fuse;會不會好危險ga? Put it this way, when I was living in Toronto, where 2 prongs no fuse plugs were used, it was very very rare that electrical appliance catching fire on their own. Of course, all electrical appliances sold there had to obtain the rather strict CSA certificate (or UL in the US) before they could be sold and nobody would take the risk of selling anything without the proper certification. The typical electrical fires happened there were usually caused by old/faulty wiring or overloaded old extension cords (there used to allow some very iffy extension codes to be sold 20 or so years ago) rather than by faulty electrical appliances. As for electrical appliances without the earthing pin, most of them were "double insulated" such that it wouldn't matter which way you plug in the power plug. For others, they would have "coded" plugs which can be plugged in only one way (if you care to check the US style power sockets, one hole is actually longer than the other). |
olddude 正式會員 218.xxx.xxx.165 |
2011-04-09 08:58 |
| [#37] 電反箱問題 完全是天荒夜談，交流電相怎可能影響到聲音相位？電相會影響系統的是干擾而已，例如對地電位，變壓器漏磁等等。交流電相接入變壓器，正相、反相最大影響是漏磁率，交流電經過整流電路後已經變成了直流工作，就再沒有正相反相之說。一套系統是否出正相聲，最好用測試軟件進行。 That is nothing impossible. Please pay attention to this issue then get back to me. 最後修改時間: 2011-04-09 12:16:17 |
rcywong 正式會員 1.xxx.xxx.171 |
2011-04-09 12:15 |
| [#38] 電反箱問題 其他事會唔會 nothing impossible 我無意見，不過交流電相位能影響聲音相位呢種講法，我可以非常十分之肯定係 impossible，有時間反對既不如上網有找些資料update一下自已知識，呢d係70年代中學常識。 |
simon62 正式會員 119.xxx.xxx.241 |
2011-04-09 16:17 |
| [#39] 電反箱問題 不過交流電相位能影響聲音相位呢種講法，我可以非常十分之肯定係 impossible X2 I ONLY AGREE 交流電相位能影響聲音 NOT 聲音相位 |
batmanames04 正式會員 124.xxx.xxx.77 |
2011-04-09 16:24 |
| [#40] 電反箱問題 As far as I know you're myopia. Please listen...listen again...and listen again and again..... Think about the power supply circuit which is 180 degree delayed if the mains L & N at in reversed codition. Although DC regulator circuit can get it smoothest but it still affects shifting in cycle times at the rectified circuitry 最後修改時間: 2011-04-09 20:11:51 |
rcywong 正式會員 1.xxx.xxx.171 |
2011-04-09 19:56 |
