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-   -   dipole sub H-Frame, phase or opposite phase ? (http://www.diyaudio.com/forums/multi-way/36329-dipole-sub-h-frame-phase-opposite-phase.html)

mbon 19th June 2004 04:04 PM

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....

http://www.woodartistry.com/linkwitz...May0318-1b.JPG

sreten 19th June 2004 04:13 PM

You wire the drivers in opposite phase so
cone movement is in the same direction.

:) sreten.

mbon 19th June 2004 04:18 PM

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 !

;)

Svante 19th June 2004 04:24 PM

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.

sreten 19th June 2004 06:36 PM

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.

:) sreten.

johninCR 19th June 2004 07:43 PM

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.

Svante 19th June 2004 08:36 PM

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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