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Old 19th June 2004, 05:04 PM   #1
mbon is offline mbon  France
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Default dipole sub H-Frame, phase or opposite phase ?

I want to try this but do I wire drivers as usual (red on red, black on black so in phase) or in opposition (red on black for one driver)

??????

yes I know this is a stupid question but I've seached and no answer....

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Old 19th June 2004, 05:13 PM   #2
sreten is offline sreten  United Kingdom
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You wire the drivers in opposite phase so
cone movement is in the same direction.

sreten.
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Old 19th June 2004, 05:18 PM   #3
mbon is offline mbon  France
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Quote:
Originally posted by sreten
You wire the drivers in opposite phase so
cone movement is in the same direction.

sreten.
Thank you for so fast and accurate answer !

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Old 19th June 2004, 05:24 PM   #4
Svante is offline Svante  Sweden
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Come to think of it, what would happen the other way around? It would become a quadropole, right? I'm not saying it would be good, I just wonder what would happen with the directivity and frequency response.
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Old 19th June 2004, 07:36 PM   #5
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by Svante
Come to think of it, what would happen the other way around? It would become a quadropole, right? I'm not saying it would be good, I just wonder what would happen with the directivity and frequency response.
Simply a non-starter, given the module has to be rolled
off to supress the H frame frame resonances, so at lower
effective frequencies the two drivers would simply cancel.

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Old 19th June 2004, 08:43 PM   #6
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Quote:
Originally posted by Svante
Come to think of it, what would happen the other way around? It would become a quadropole, right? I'm not saying it would be good, I just wonder what would happen with the directivity and frequency response.

It would generate very little sound. I tried it with a W baffle for kicks and it was almost silent.
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Old 19th June 2004, 09:36 PM   #7
Svante is offline Svante  Sweden
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Yes, it's probably a bad idea, I was just thinking that whatever little that comes out of it could be even more directed than from the dipole.

I think I heard of the opposite once, ie a quadropole microphone. It would be something they used in helicopters to supress ambient noise. Ah, well...
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