＂反相＂問題？，

billymud

師兄， i suspect that u're talking about the polarity of a mono-block power amp.  aren't u ?
           共陰模式(common cathode)的真空管放大相位是actually反相的 (ususally applied in Pre-Amp stage), i doubt the輸出變壓器次級端級喇叭端子need be 刻意把端子反接.  afaik, 所謂"IN-Phase"/"Out-of-Phase"問題，是在於左右兩只喇叭(i.e. Stereo).
btw, apply a 9V cell may damage ur speaker as suggested.

chanwt

billymud 發表於 2013-3-11 21:40
師兄， i suspect that u're talking about the polarity of a mono-block power amp.  aren't u ?
       ...

Yes, billy 兄，you are right to point out my mistake. I was using only 1.5v not 9v for the speaker unit test.

And I think the web page I was reading was about a integrated amp but not mono block pre amp. Anyway, I feel the same as you, I think it is unnessary to intentionally, change the polarity wires for both speaker output terminals.

leung3412

zoneaudio 發表於 2013-3-11 12:52
好簡單自己試,收PM

C兄, 方便方享嗎? 我都想試試 thanks

edison133

師兄，咁單看旦的數量是不夠！還要看交連電容的數量！因為過了交連後一樣是反相！