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正反相錄音

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samuelsum 發表於 2008-10-30 16:19:09 | 顯示全部樓層 |閱讀模式
踏入十月份, 幾個發燒的網站都出現熱烈的討論..."反相錄音"

小弟見過的文章, 覺得依篇英文寫得較好
http://www.gcaudio.com/resources/howtos/absolutephase.html

請問各位大大 :?: 你o地又有咩睇法, 怕得罪熟人/前輩, 因為我主觀覺得有好多人都錯...

話晒hififever都有3個THX Certified...嘛 :wink:
autumnleaf 發表於 2008-10-30 21:18:01 | 顯示全部樓層
"How do we know which orientation is correct? A trial and error approach is really the only way that we can determine proper orientation." ...  

http://www.gcaudio.com/resources/howtos/absolutephase.html


I believed the phasing matter definitely existing in the complete audio chain from recording venue to our ear. To investigate the correct phase issue may need a great amount of "technical" experiment, intensive listening and perhaps further probing to recording industry personnel.

However I like to treat this seriously. To ensure the finding is concrete and general, the phenomenon must be proven on known phasing system.

Do you actually know your electronics and loudspeaker phase correctness?

Some loudspeaker has its tweeter inverting connected in order to obtain a better phase coherence with the woofer because of its higher order crossover network introducing phase shift probably up to 180 deg out of phase at crossover point, that make things much more complicated.
autumnleaf 發表於 2008-10-31 01:28:19 | 顯示全部樓層
Audio Physics loudspeaker

tweeter positive polarity (correct phase)
midrange positive polarity (correct phase)
woofer negative polarity (inverting phase)

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autumnleaf 發表於 2008-10-31 01:31:48 | 顯示全部樓層
Martin Design loudspeaker

tweeter positive polarity (correct phase)
midrange negative polarity (inverting phase)
woofer positive polarity (correct phase)

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autumnleaf 發表於 2008-10-31 01:33:38 | 顯示全部樓層
Proac loudspeaker

tweeter negative polarity (inverting phase)
woofer positive polarity (correct phase)

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autumnleaf 發表於 2008-10-31 01:39:57 | 顯示全部樓層
B&W loudspeaker

tweeter positive polarity (correct phase)
midrange positive polarity (correct phase)
woofer positive polarity (correct phase)

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autumnleaf 發表於 2008-10-31 08:03:00 | 顯示全部樓層
The possible outcome would be like that: if for say four guys own the above loudspeakers individually, for say again, the recording phase issue finding from the B&W guys might different from what by Proac and Martin guys. But might be similar to the Audio Physics guy.

However we would at least verify the fact on reverting phase.
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